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Start Over Author "Yonghui Zhou" Publisher american physical society (aps)
35 results on '"Yonghui Zhou"'

10. Coupling between antiferromagnetic and spin-glass orders in the quasi-one-dimensional iron telluride TaFe1+xTe3 ( x=0.25 )

Author

J. J. Bao, Zengwei Zhu, Liangcai Xu, Xianglin Ke, Guanghan Cao, Wen-He Jiao, C. Q. Xu, Zhaorong Yang, Yonghui Zhou, Hong Zhang, Sudeep Kumar Ghosh, Huan Yang, Xiaofeng Xu, Yi Liu, Pabitra Kumar Biswas, and Z. Ren

Subjects
Physics, chemistry.chemical_compound, Spin glass, Exchange bias, chemistry, Condensed matter physics, Telluride, Antiferromagnetism, Order (ring theory), Condensed Matter::Strongly Correlated Electrons, Electron, Coupling (probability), Spin-½
Abstract

Understanding the interplay among different magnetic exchange interactions and its physical consequences, especially in the presence of itinerant electrons and disorder, remains one of the central themes in condensed matter physics. In this vein, the coupling between antiferromagnetic and spin-glass orders may lead to large exchange bias, a property with potential broad technological applications. In this paper, we report the coexistence of antiferromagnetic order and spin-glass behaviors in the quasi-one-dimensional iron telluride ${\mathrm{TaFe}}_{1+x}{\mathrm{Te}}_{3}$ ($x=0.25$). Its antiferromagnetism is believed to arise from the antiferromagnetic interchain coupling between the ferromagnetically aligned FeTe chains along the $b$ axis, while the spin-glassy state stems from the disordered Fe interstitials. This dichotomic role of chain and interstitial sublattices is responsible for the large exchange bias observed at low temperatures, with the interstitial Fe acting as the uncompensated moment and its neighboring Fe chain providing the source for its pinning. This iron-based telluride may thereby represent a paradigm to study the large family of transition metal chalcogenides whose magnetic order or even dimensionality can be tuned to a large extent, forming a fertile playground to manipulate or switch the spin degrees of freedom thereof.

Published
2021
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11. Pressure-induced reemergence of superconductivity in the topological kagome metal CsV3Sb5

Author

Zheng Chen, Xuliang Chen (陈绪亮), Ying Zhou, Lili Zhang, Shuyang Wang, Jianhui Zhou, Yifang Yuan, Haiyang Yang, Jing Wang, Yonghui Zhou, Zhaorong Yang, Zhuyi Zhang (张朱一), Chao An, and Xiangde Zhu

Subjects
Physics, Diffraction, Superconductivity, Condensed matter physics, Macroscopic quantum phenomena, Fermi surface, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Synchrotron, law.invention, Metal, law, Hall effect, Condensed Matter::Superconductivity, visual_art, 0103 physical sciences, visual_art.visual_art_medium, 010306 general physics, 0210 nano-technology, Topological quantum number
Abstract

The quasi-two-dimensional kagome superconductors $A$V${}_{3}$Sb${}_{5}$ ($A$ $=$ K, Rb, and Cs) have attracted great interest due to various exotic quantum phenomena, such as topological charge density waves and the giant anomalous Hall effect. Here, the authors find two-dome unconventional superconductivity in CsV${}_{3}$Sb${}_{5}$ under high pressure. They also confirm the absence of a structural phase transition up to 43.1 GPa through high-pressure synchrotron x-ray diffraction measurements, suggesting that the novel reemergent superconductivity dome can be attributed to the Fermi surface reconstruction caused by the Lifshitz transition.

Published
2021
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12. Pressure-induced superconductivity in the quasi-one-dimensional charge density wave material CuTe

Author

Xiaoping Yang, Yonghui Zhou, Chao An, Lili Zhang, Chuanchuan Gu, Xuliang Chen (陈绪亮), Ying Zhou, Zhaorong Yang (杨昭荣), and Shuyang Wang (王舒阳)

Subjects
Superconductivity, symbols.namesake, Materials science, Condensed matter physics, Electrical resistivity and conductivity, Transition temperature, symbols, Order (ring theory), Orthorhombic crystal system, Raman spectroscopy, Charge density wave, Monoclinic crystal system
Abstract

Copper monotelluride CuTe has a layered orthorhombic structure (space group Pmmn, No. 59) but exhibits a quasi-one-dimensional charge density wave (CDW) order. Here, we present a high-pressure study of CuTe in a diamond anvil cell at pressures up to 41.8--49.8 GPa, through a combination of electrical transport, synchrotron x-ray diffraction (XRD), and Raman spectroscopy measurements as well as theoretical calculations. Our transport experiments show that the CDW transition is manifested as a hump in resistivity; with the application of external pressure, its transition temperature ${T}_{\mathrm{CDW}}$ decreases gradually and the amplitude of the resistivity hump decays rapidly. The CDW gets suppressed completely above \ensuremath{\sim}10 GPa as estimated by a linear extrapolation of the ${T}_{\mathrm{CDW}}$ versus $P$ trend. Upon further compression, a sudden drop in resistivity is initially observed at \ensuremath{\sim}2.4 K and \ensuremath{\sim}20 GPa, and zero resistance is established above \ensuremath{\sim}37 GPa, suggesting the occurrence of superconductivity (SC). Combined XRD and Raman data as well as theoretical calculations together evidence that the emergence of SC at \ensuremath{\sim}20 GPa is accompanied by an orthorhombic to monoclinic (space group $\mathit{Cm}$, No. 8) structural transition.

Published
2021
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13. Pressure-induced superconductivity in trigonal layered PtBi2 with triply degenerate point fermions

Author

Xuliang Chen, Ying Zhou, Mingliang Tian, Yonghui Zhou, Jing Wang, Chuanchuan Gu, Zhaorong Yang, and Chao An

Subjects
Superconductivity, Physics, Spintronics, Magnetoresistance, Condensed matter physics, 02 engineering and technology, Fermion, Crystal structure, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, Semimetal, Condensed Matter::Materials Science, Hall effect, 0103 physical sciences, 010306 general physics, 0210 nano-technology
Abstract

Materials with nonsaturating, extremely large magnetoresistance (XMR) attract continuous research interest due to their great potential in the fields of spintronics and magnetic sensors/switches. Here, we report the discovery of pressure-driven superconductivity (SC) in trigonal ${\mathrm{PtBi}}_{2}$, a semimetal material with nontrivial triply degenerate point fermions exhibiting a nonsaturating XMR effect, above a critical pressure of $\ensuremath{\sim}5--6$ GPa. The superconducting transition onset temperature is $\ensuremath{\sim}2$ K and displays a very weak pressure dependence across a broad pressure range of $\ensuremath{\sim}5--48$ GPa. The lattice structure of trigonal ${\mathrm{PtBi}}_{2}$ is stable against pressure at least to 12.9 GPa. Around the same critical pressure where the SC emerges, the Hall coefficient varies violently and shows a sign crossover from low pressure positive (hole dominated) to high pressure negative (electron dominated), probably indicating a close relationship between them.

Published
2021
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14. Model-Independent Study of Structure in B+→D+D−K+ Decays

Author

L. Calefice, Julian Alexander Boelhauve, Marco Adinolfi, A. Fernandez Prieto, Emmy Gabriel, Benedetto Gianluca Siddi, Jascha Peter Grabowski, V. Shevchenko, Anna Danilina, Cedric Meaux, A. Petrolini, M. Patel, Anastasiia Kharisova, Federico Lazzari, N. K. Watson, S. Eidelman, Kevin Heijhoff, Lorenzo Capriotti, Yiheng Luo, Deepanwita Dutta, Stefano Petrucci, F. Blanc, G. Carboni, D. E. Hutchcroft, Pascal Vincent, Marcel Materok, Rizwaan Adeeb Mohammed, Vitalii Lisovskyi, Simon Stemmle, S. Playfer, Edoardo Franzoso, Frank Ferrari, James Mwangi Kariuki, R. Lefèvre, Marco Petruzzo, G. Graziani, Marian Stahl, David Gascon, Naomi Veronika Raab, Jana Crkovská, J. Lomba Castro, Da Yu Tou, F. Teubert, Igor Skiba, Yang Yang, Ivan Solovyev, W. Baldini, A. Lai, Andrea Mauri, Wenbin Qian, James Vincent Mead, F. Goncalves Abrantes, A. Jawahery, Thomas Peter Jones, Andrea Lampis, B. Fang, G. Valenti, W. Wislicki, C. Santamarina Rios, Titus Mombächer, Thomas Grammatico, Y. Gao, A. Alfonso Albero, G. Wormser, Kenenbek Arzymatov, O. Steinkamp, Guy Wilkinson, P. Vazquez Regueiro, D. De Simone, Viacheslav Matiunin, Yonghui Zhou, Marco Cattaneo, Daniel Vieira, Ming Zeng, Tommaso Pajero, Yawen Wang, Sebastian Neubert, Kuzma Ivshin, Joan Mauricio, Philipp Ibis, Jordy Sebastiaan Butter, Marcin Kucharczyk, Maximilien Chefdeville, M. van Veghel, G. Martellotti, Petr Fedin, Vladimir Chulikov, C. Haen, Artem Maevskiy, C. B. Van Hulse, Oleg Yushchenko, Xiao-yan Li, Olivier Deschamps, Niklas Stefan Nolte, Ying Lu, Mark Wilkinson, Roland Waldi, Razvan Daniel Moise, J. M. Yu, Agnieszka Oblakowska-Mucha, Martina Ferrillo, X. Han, Martha Hilton, F. Archilli, Cynthia Nunez, B. Malecki, M. Pepe Altarelli, Thomas Harrison, Edward James Millard, Marco Gersabeck, M. Vieites Diaz, D. R. Johnson, Maciej Witold Majewski, C. R. Jones, Matthew Scott Rudolph, W. D. Hulsbergen, J. A. Rodriguez Lopez, Sook Hyun Lee, M. J. Bradley, Gary Robertson, Sergey Gromov, Lucian Cojocariu, Mark Smith, M. Tobin, Krzysztof Swientek, Olga Madejczyk, Franco Bedeschi, P. Fernandez Declara, C. Vázquez Sierra, Lucio Anderlini, Chenxi Gu, Ina Carli, Nikita Kazeev, A. Casais Vidal, L. Meyer Garcia, B. Quintana, E. Santovetti, Tatiana Gaintseva, Stephen G. Weber, Richard Lane, Gediminas Sarpis, A. Brossa Gonzalo, P. Gironella Gironell, Tabitha Halewood-leagas, Zishuo Yang, M. Palutan, L. Dieste Maronas, M. O. Bettler, M. R. J. Williams, Naomi Cooke, L. Zhang, S. Ferreres Sole, I. V. Gorelov, K. Müller, Giovanni Bassi, Timon Schmelzer, Timofei Maltsev, J. Serrano, V. Gibson, R. Schwemmer, Mauro Morandin, Zhiyu Xiang, X. Cid Vidal, F. Muheim, John Gordon Smeaton, Guanghua Gong, Christopher John Parkinson, M. Veltri, G. Haefeli, Jennifer Clare Smallwood, L. Calero Diaz, Yuyue Gan, Anatoly Butkevich, Valery Pugatch, Vladimir Romanovskiy, A. Zhelezov, K. Carvalho Akiba, Aleksei Chernov, Xiaofeng Zhu, C. Remon Alepuz, A. Papanestis, Gaia Lanfranchi, A. Grecu, D. Sanchez Gonzalo, N. Tuning, John Matthew Durham, K. E. Kim, Amanda May Donohoe, William Parker, K. De Bruyn, Dana Bobulska, Violaine Bellee, William Dean, Alessandra Gioventù, Andrey Ustyuzhanin, G. Punzi, J. J. Back, M. Rotondo, Serhii Cholak, J. M. Otalora Goicochea, Piera Muzzetto, Wolfgang Funk, Matthew George Chapman, Marko Milovanovic, Emilie Maurice, F. Polci, Loris Martinazzoli, Markus Frank, Ao Xu, Mara Senghi Soares, Jakob Haimberger, J. García Pardiñas, D. Torres Machado, R. Lindner, Elisabeth Maria Niel, Davide Fazzini, Sonia Amina Bouchiba, T. Ruf, Y. Li, R. Silva Coutinho, Ryan Newcombe, Evgenii Shmanin, J. Maratas, Ifan Williams, Sergei Popov, Bernardo Adeva, Lex Marinus Greeven, Renata Kopecna, Andrea Merli, Jakub Ryzka, Timothy Evans, Jacopo Cerasoli, Dmitrii Maisuzenko, Hans Dijkstra, Bhagyashree Pagare, Alessandro Pastore, Zhenzi Wang, Veronica Soelund Kirsebom, Zan Ren, J. H. Lopes, Zhipeng Tang, Adam Dendek, B. Garcia Plana, Anastasia Smetkina, D. Martinez Santos, J. Z. Fan, Wenhua Hu, Y. Zhang, Youen Kang, S. Blusk, Saverio Mariani, Vukan Jevtic, Alessandro Camboni, K. M. Fischer, M.-N. Minard, A. Vorobyev, Marek Jezabek, F. Dordei, Martino Borsato, Mark Whitehead, P. Garcia Moreno, D. Zhang, J. J. Xu, Karlis Dreimanis, R. Calabrese, Sophie Elizabeth Hollitt, Lucas Mcconnell, Tommaso Colombo, Carmen Giugliano, Silvia Borghi, M. Karacson, Qundong Han, Basem Khanji, Y. Xie, Thomas Blake, H. Schindler, Marek Idzik, Thomas Hadavizadeh, Maxim Borisyak, C. Gaspar, Davide Brundu, Jing Wang, Colm Harold Murphy, Resmi P.K, Arnaud Robert, Hannah Louise Pullen, M. Korolev, J. He, Surapat Ek-In, Alex Pearce, C. Patrignani, V. Tisserand, M. Andreotti, Gennady Panshin, M. Poli Lener, M. van Beuzekom, X. Huang, Patrick Owen, Fabrice Desse, Alexander Semennikov, Kevin Heinicke, Fedor Baryshnikov, Christoph Langenbruch, Chung Nguyen-Mau, Kara Renee Mattioli, M. Cruz Torres, Gregory Ciezarek, Marcel Merk, Konrad Klimaszewski, Fidan Suljik, Sara Celani, Aravindhan Venkateswaran, Jia-Jia Qin, Anatoly Konoplyannikov, Scott Ely, Maria Elena Stramaglia, Giulia Frau, Lishuang Ma, C. Chen, M. De Cian, Hongjie Mu, Jonas Rademacker, Jozef Tomasz Borsuk, Stephen M. Stahl, Marie Bachmayer, N. Neufeld, Viacheslav Duk, C. Sanchez Mayordomo, Daniele Marangotto, Feng Jiang, Matthieu Marinangeli, S. J. Chen, Jacopo Pinzino, C. Sanchez Gras, Gianluigi Casse, Angelo Loi, S. Easo, Miroslaw Firlej, R. Santacesaria, Anna Ossowska, Nathan Jurik, Lain-Jong Li, Tamaki Holly Mcgrath, Giovanni Cavallero, Fionn Caitlin Ros Bishop, Stefano Zucchelli, E. Jans, Lauren Emma Yeomans, H. V. Cliff, Anthony Gavin Downes, Sofia Kotriakhova, Jeremy Dalseno, P. Griffith, Daniel Joachim Unverzagt, Srishti Bhasin, Guillaume Pietrzyk, Louis Henry, Paolo Ciambrone, Hilbrand Steffen Kuindersma, Danila Saranin, Tomasz Fiutowski, P. Collins, Y. Sun, Andrii Usachov, M. Rama, F. Fontanelli, Michele Veronesi, Zakariya Aliouche, Federico Alessio, Christoph Hasse, G. Passaleva, Christopher James Pawley, Christopher Burr, D. Vom Bruch, Julien Cogan, Artem Ryzhikov, P. Campana, Hongxi Xing, Nis Meinert, Shudong Zhang, Alison Tully, Michal Kreps, Sergey Strokov, L. M. Garcia Martin, Paolo Carniti, Meril Reboud, B. Jost, M. S. Rangel, Liupan An, R. Matev, B. Rachwal, Victor Egorychev, Alexander Berezhnoy, Hanna Malygina, Mikhail Mikhasenko, Andrea Bizzeti, Sara Sellam, G. Manca, Diego Alejandro Milanes, Paul Seyfert, M. J. Morello, P. Perret, William Barter, Martina Pili, Angelo Carbone, Mika Vesterinen, Ph. Charpentier, O. Schneider, Natalia Polukhina, Qiang Xu, Alexander Malinin, Gerwin Meier, S. Kandybei, J. A. B. Coelho, M. T. Tran, R. McNulty, P. Krokovny, Eduardo Rodrigues, M. Senghi Soares, Sergey Barsuk, M. Xu, Cameron Thomas Dean, B. Souza De Paula, R. Vazquez Gomez, H. W. Van Hecke, Oliver Lantwin, Michal Dziewiecki, Karol Hennessy, N. Valls Canudas, M. Brodski, François Fleuret, Jaap Velthuis, B. Leverington, D. Yang, E. Grauges, M. Chrzaszcz, L. Giubega, A. Oyanguren, T. Kirn, Stephane T'Jampens, Vlad-Mihai Placinta, Jennifer Brigitta Zonneveld, I. A. Monroy, R. Nandakumar, F. Machefert, Tai-hua Lin, Olli Lupton, L. G. Scantlebury Smead, M. Charles, A. B. Rodrigues, P. Alvarez Cartelle, Marco Clemencic, Luyan Sun, Mikkel Bjørn, K. Wyllie, F. A. Garcia Rosales, Lars Eklund, B. Pietrzyk, Mark Slater, Vladislav Belavin, E. Spadaro Norella, Cheryl Pappenheimer, Y. H. Zheng, Eliane Epple, Florian Reiss, S. Malde, Jonas Nathanael Eschle, L. Tomassetti, Adam Szabelski, V. V. Gligorov, C. Marin Benito, Tatiana Ovsiannikova, Nikolai Voropaev, David Anthony Friday, A. Ukleja, Yue Pan, T. J. Gershon, C. J. G. Onderwater, Alexander Inglessi, A. G. Morris, Stefano Cali, George Coombs, E. van Herwijnen, Elena Graverini, T. E. Latham, L. Shekhtman, Maciej Pawel Szymanski, Jiangqiao Hu, A. Dziurda, Elie Aslanides, Roger Forty, Alexander Battig, Xixin Liang, Gabriele Simi, Lukas Witola, Artur Ishteev, C. Parkes, Silvia Gambetta, Ziad Ajaltouni, Valeriia Lukashenko, Arthur Marius Hennequin, Heather Mckenzie Wark, S. Perazzini, M. Franco Sevilla, Dmitry Popov, Simon Akar, E. Ben-Haim, Maxime Schubiger, Anton Philippov, Nicola Serra, H. B. Liu, A. Bay, Abbie Jane Chadwick, Matthieu Kecke, Flavio Pisani, B. T. Meadows, Antonio Pellegrino, Alexey A. Petrov, Joseph David Shupperd, F. Redi, R. Graciani Diaz, Halime Sazak, Andrew Beiter, Alexandre Boyer, Claire Prouve, Neville Harnew, G. Raven, D. Decamp, A. Golutvin, A. F. Campoverde Quezada, E. Polycarpo, Tatsuya Nakada, Marco Guarise, Vladislav Balagura, F. Stagni, Victor Coco, Zhuoming Li, Phoebe Meredith Hamilton, Jan Buytaert, P. Spradlin, Ignacio Bediaga, Desmond Mzamo Shangase, M. D. Sokoloff, U. Marconi, F. F. Wilson, Lingzhu Bian, A. Gomes, Federico Betti, L. A. Granado Cardoso, S. Meloni, Ilia Belov, G. Bencivenni, S. Esen, Wojciech Kucewicz, Gianluca Zunica, Michele Atzeni, G. Mancinelli, Conor Fitzpatrick, Antonino Sergi, T. Boettcher, M. Plo Casasus, Mateusz Goncerz, Barbara Sciascia, Stephanie Schulte, Sergey Didenko, Simone Bifani, S. Farry, W. Huang, M. Mukherjee, Ryan Calladine, Plamen Hristov Hopchev, Francesco Dettori, A. Brea Rodriguez, Dmitrii Ilin, Yanting Fan, Maria Flavia Cicala, Petr Andreevich Gorbounov, Jordan Daniel Roth, Michele Piero Blago, Hossein Afsharnia, G. Liu, Marco Santimaria, D. Websdale, B. Couturier, R. A. Fini, Daniel Berninghoff, A. Falabella, M. Sarpis, Biagio Saitta, Stanislav Luchuk, L. R. Madhan Mohan, Lesya Shchutska, D. Campora Perez, Moran Wang, Carmelo D'Ambrosio, Jean François Marchand, V. Kudryavtsev, D. R. Ward, Oleg Stenyakin, S. Tolk, Donal Murray, E. Cogneras, Emilie Bertholet, Peilian Li, Xiao-Rui Lyu, E. Dall’Occo, E. Golobardes, Jonathan Plews, R. Currie, C. Abellán Beteta, S. Capelli, P. De Simone, S. Hansmann-Menzemer, Gerd Joachim Kunde, A. Schopper, L. De Paula, Baasansuren Batsukh, Zhihong Shen, S. Schael, Marianna Fontana, Luca Minzoni, Dylan Jaide White, Michela Garau, S. A. Wotton, Patrick Robbe, P. Baladron Rodriguez, John Jake Lane, K. Petridis, Serhii Koliiev, Rudolf Oldeman, C. A. Aidala, L. Del Buono, Roman Litvinov, Ilaria Neri, F. J. P. Soler, Niladribihari Sahoo, A. Tsaregorodtsev, Oleksander Kot, Xia-Ji Liu, Sheldon Stone, S. C. Haines, A. Hicheur, Felix Johannes Kress, Shantam Taneja, B. Spaan, J. Closier, A. Massafferri, Philipp Roloff, Alexandra Paige Rollings, John Leslie Cobbledick, Roel Aaij, Vadym Denysenko, M. De Serio, D. Lacarrere, C. L. Da Silva, R. Mountain, Claudia Bertella, Murdo Traill, Rui Wang, Aleksandra Snoch, S. Vecchi, Quentin Fuehring, Phillip John Marshall, A. Gallas Torreira, Wojciech Krzemien, Tobias Tekampe, M. McCann, Carina Trippl, Dawid Gerstel, Eluned Smith, Hangyi Wu, Lucia Grillo, Aleksandr Solovev, C. Matteuzzi, Andreas Güth, Margarete Schellenberg, Peter Svihra, T. D. Nguyen, T. Lesiak, C. A. Chavez Barajas, A. McNab, Roland Bernet, Ross John Hunter, Alessio Piucci, Holger Stevens, Hang Yin, O. Boente Garcia, Robbert Erik Geertsema, Evelina Gersabeck, Barbara Passalacqua, Samuel Belin, Mauro Piccini, Benjamin Audurier, Malte Hecker, Denis Derkach, F. Ferreira Rodrigues, Renato Quagliani, Dmitrii Pereima, Fedor Ratnikov, Yasmine Amhis, Gabriela Johanna Pomery, Michael Becker, Dmitry Golubkov, Matteo Giovannetti, Alexander D. Popov, Alexey Boldyrev, M. H. Schune, C. Göbel, O. Maev, Giulia Tuci, Abhijit Mathad, Almagul Kondybayeva, A. Romero Vidal, Constantin Weisser, Sergey Legotin, D. Hynds, D. Galli, Marina Artuso, Salvatore Aiola, Philip Ilten, L. Garrido, H. Li, Tomasz Skwarnicki, Davide Zuliani, Patrick Mackowiak, U. Uwer, Sebastian Bachmann, V. Obraztsov, Jakub Moron, Sergei Kholodenko, Kodassery Prasanth, Hans Dembinski, Roberta Cardinale, Roberto Ribatti, M. Shapkin, Floris Keizer, D. Pinci, Jihyun Bhom, Mariia Poliakova, E. Vilella Figueras, L. Ferreira Lopes, Simon Baker, M. Lucio Martinez, Stephan Eisenhardt, Liliana Congedo, F. L. Souza De Almeida, Brij Kishor Jashal, Lorenzo Pica, Pavol Stefko, A. Palano, Tomasz Szumlak, Lukas Gruber, R. Le Gac, V. Franco Lima, Alexandru Ene, E. Thomas, Ivan Polyakov, F. Maciuc, Tara Shears, S.-G. Chitic, Adam Benjamin Morris, J. A. de Vries, Georgios Chatzikonstantinidis, S. Filippov, Samuel Maddrell-Mander, P. Naik, Mauricio Féo, R. Jacobsson, Rafal Dominik Krawczyk, P. Gandini, Matthew James Tilley, Matteo Bartolini, Nathanael Farley, M. Witek, M. Needham, Matthew Birch, Igor Kostiuk, L. Kravchuk, Alessandro Cardini, Chishuai Wang, J. M. De Miranda, Anton Poluektov, Lorenzo Sestini, E. Govorkova, Harald Viemann, Alexander Leflat, M. Mulder, A. Bursche, S. Ricciardi, V. Vorobyev, M. Romero Lamas, M. Ferro-Luzzi, I. Longstaff, L. L. Pappalardo, P. Camargo Magalhaes, Adam Davis, Aleksei Andreianov, N. Sagidova, O. Zenaiev, F. Martinez Vidal, Tjeerd Ketel, R. I. Rabadan Trejo, Sune Jakobsen, Konstantin Gizdov, Wiktor Byczynski, M. Martinelli, J. Baptista Leite, Ouail Kitouni, Johannes Albrecht, Dominik Stefan Mitzel, Gianfranco Morello, Pawel Kopciewicz, Claudio Gotti, Blaise Delaney, Laura Promberger, Christoph Frei, P. Billoir, Malcolm John, M. Gandelman, Victor Renaudin, Pietro Marino, M. Schmelling, J. Fu, Sandra Amato, A. Bondar, Vladimir Macko, I. Nasteva, Dominik Müller, V. Vagnoni, Yury Guz, Alessio Sarti, M. Fiorini, E. Gushchin, Andrea Valassi, Tara Nanut, K. Belous, Jolanta Brodzicka, Dong Xiao, Biljana Mitreska, Matthew Kenzie, Zehua Xu, Daria Strekalina, E. Luppi, A. Bertolin, Shuaiyi Liu, Mark Hatch, Xavier Vilasis-Cardona, Laurent Dufour, Nicola Neri, C. M. Costa Sobral, Johannes Heuel, Sara Elizabeth Mitchell, A. Dovbnya, J. J. Walsh, Davide Lancierini, Daniel Patrick O'Hanlon, Z. Mathe, Veronika Chobanova, Nikolay Bondar, Jan Langer, M. Pappagallo, Ph. Ghez, A. Sciubba, Paul Andre Günther, O. De Aguiar Francisco, Miroslav Saur, Tengiz Kvaratskheliya, Paul Nathaniel Swallow, A. Lusiani, B. R. Gruberg Cazon, J. Marks, Antje Mödden, M. Straticiuc, Yuezhe Yao, Huacheng Cai, G. D. Lafferty, T. Gys, Ivan Shchemerov, Preema Rennee Pais, Ekaterina Trifonova, l. Soares Lavra, P. Di Nezza, S. Klaver, J. J. Saborido Silva, Anna Lupato, S. Monteil, George Holger Lovell, R. Manera Escalero, Manuel Schiller, Lauren Douglas, Biplab Dey, Serena Maccolini, Wojciech Krupa, Alexsei Chubykin, Simon Nieswand, Annarita Buonaura, Valery Zhukov, J. M. Fernandez-tenllado Arribas, S. Simone, Christopher Betancourt, A. Satta, Ulrik Egede, Svende Braun, C. Satriano, A. Contu, Olivier Leroy, Polina Kravchenko, Harris Conan Bernstein, C. Bozzi, A. Puig Navarro, R. J. Barlow, E. L. Gkougkousis, Marta Calvi, B. Schmidt, Ivan Belyaev, Jan-Marc Basels, A. Artamonov, Michal Kazimierz Mazurek, D. Wiedner, A. Dzyuba, Guillermo Loustau, D. Hill, Li Xu, S. De Capua, Ia. Bezshyiko, Nikolay Nikitin, S. Gomez Fernandez, Daniel Stephen Richards, D. Savrina, Philippe d'Argent, P. E. L. Clarke, Sebastien Ponce, Kayleigh Anne Thomson, Daniele Manuzzi, A. C. dos Reis, G. Alkhazov, Mikhail Hushchyn, Xuhao Yuan, Jiayin Sun, Sophie Katharina Kretzschmar, M. Calvo Gomez, Maciej Wojciech Dudek, E. B. Shields, G. Corti, Martin Stefan Bieker, Daniel Charles Craik, M. Ramos Pernas, P. Durante, Giacomo Vitali, Louis Lenard Gerken, Stephan Escher, Patrick Koppenburg, B. D. C. Westhenry, Sandro Cadeddu, D. Melnychuk, X. J. Zhou, Thomas Ackernley, A. Vollhardt, Kristian Alexander Zarebski, Michael Alexander, D. Lucchesi, Thomas Henry Hancock, Alex Seuthe, Mark Richard James Williams, Mikhail Zavertyaev, Nicola Skidmore, Vasyl Dobishuk, Themistocles Bowcock, Stanislav Poslavskii, David Gerick, J. Ruiz Vidal, Kurt Rinnert, Milosz Zdybal, and Alexander Vagner

Subjects
Physics, Particle physics, Large Hadron Collider, 0103 physical sciences, Structure (category theory), General Physics and Astronomy, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, 01 natural sciences, Luminosity
Abstract

The only anticipated resonant contributions to $B^+\to D^+D^-K^+$ decays are charmonium states in the $D^+D^-$ channel. A model-independent analysis, using LHCb proton-proton collision data taken at centre-of-mass energies of $\sqrt{s}=7,8,$ and $13$ TeV, corresponding to a total integrated luminosity of 9 fb$^{-1}$, is carried out to test this hypothesis. The description of the data assuming that resonances only manifest in decays to the $D^+D^-$ pair is shown to be incomplete. This constitutes evidence for a new contribution to the decay, potentially one or more new charm-strange resonances in the $D^-K^+$ channel with masses around 2.9 GeV$/c^2$.

Published
2020
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15. Pressure tuning of superconductivity in Mo8Ga41 single crystals

Author

Chao An, Zhaorong Yang, Xuliang Chen, Yonghui Zhou, Chunhua Chen, Zhitao Zhang, Ying Zhou, Wenbin Wu, and Lili Zhang

Subjects
Strongly coupled, Superconductivity, Diffraction, Physics, Condensed matter physics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Amorphous phase, Amorphous solid, Pairing, 0103 physical sciences, Pressure tuning, Cooper pair, 010306 general physics, 0210 nano-technology
Abstract

We report on pressure tuning of superconductivity in a strongly coupled superconductor ${\mathrm{Mo}}_{8}{\mathrm{Ga}}_{41}$ with a critical temperature ${T}_{c}\ensuremath{\sim}9.8\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. Resistance measurements show that ${T}_{c}$ is suppressed to 3.6 K at 19 GPa followed by a nonmonotonic variation at higher pressures. Synchrotron x-ray diffraction experiments reveal an amorphization taking place at the critical pressure ${P}_{c}\ensuremath{\sim}19\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$. As comparing with $\mathrm{Mg}{\mathrm{B}}_{2}$, the ${\mathrm{Mo}}_{8}{\mathrm{Ga}}_{41}$ shows a relative low decreasing rate of ${T}_{c}$, which might be attributed to its unique vertex-sharing type of cluster architecture. Survival of superconductivity across the crystalline to amorphous transition indicates that, although long-range structural order of endohedral Ga clusters is destroyed, short-range-ordered intracluster structure still exists and allows for local Cooper pairing. Due to presence of disorders in the amorphous phase, establishment of Cooper pair coherence is shifted to lower temperatures, which causes unusual transport behaviors near ${T}_{c}$, e.g., the anomalous resistance peak and dip. The amorphous superconducting phase is able to be retained to ambient pressure and therefore provides an ideal platform to study disorder effects on superconductivity.

Published
2020
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16. Measurement of CP -Averaged Observables in the B0→K*0μ+μ− Decay

Author

V. Franco Lima, J. A. de Vries, Matthew James Tilley, Lucian Cojocariu, Mark Smith, A. Bertolin, K. Wyllie, B. Pietrzyk, Nathanael Farley, M. Witek, Aleksei Chernov, Tommaso Colombo, Cheryl Pappenheimer, K. E. Kim, William Parker, M. Needham, M. Merk, R. Silva Coutinho, Ryan Newcombe, F. Polci, Y. H. Zheng, S. Eidelman, Mick Mulder, H. F. Schreiner, G. Valenti, C. J. G. Onderwater, Basem Khanji, Y. Xie, Alexander Inglessi, D. Torres Machado, Evgenii Shmanin, Jakub Ryzka, Robert Hart, Timothy Evans, Thomas Blake, H. Schindler, Alessandro Pastore, Zhenzi Wang, Marek Idzik, Veronica Soelund Kirsebom, F. Blanc, Elena Graverini, Ph. Charpentier, C. Marin Benito, Dmitry Popov, Thomas Hadavizadeh, Johannes Albrecht, Davide Brundu, Simon Akar, Colm Harold Murphy, Arnaud Robert, Carmen Giugliano, Silvia Borghi, M. Karacson, Alexander Malinin, R. Lefèvre, Kuzma Ivshin, C. Patrignani, Markus Roehrken, Qundong Han, V. Tisserand, Giovanni Cavallero, Louis Henry, Hilbrand Steffen Kuindersma, J. H. Lopes, Zhipeng Tang, M. van Beuzekom, Scott Ely, Maria Elena Stramaglia, G. Graziani, Wenhua Hu, Y. Zhang, A. Bay, S. Blusk, Saverio Mariani, Z. Xu, Y. Gao, A. Alfonso Albero, Vukan Jevtic, O. V. Mineev, S. Esen, Alessandro Camboni, K. M. Fischer, Wojciech Kucewicz, Fedor Baryshnikov, Stefano Zucchelli, Malcolm John, Chung Nguyen-Mau, P. Naik, David Gascon, Philipp Ibis, Matthew Kelsey, A. Petrolini, Marco Petruzzo, Gregory Ciezarek, Mauricio Féo, Tomasz Fiutowski, Daniel Vieira, M. Gandelman, Jeremy Dalseno, Kevin Heijhoff, Lorenzo Capriotti, Vladislav Balagura, J. Lomba Castro, P. Vazquez Regueiro, G. Wormser, Vladimir Chulikov, Marian Stahl, A. B. Rodrigues, Viacheslav Matiunin, B. T. Meadows, Lars Eklund, Jordy Sebastiaan Butter, A. Di Canto, Naomi Veronika Raab, P. Collins, Y. Sun, P. Griffith, Paolo Ciambrone, Pietro Marino, M. Schmelling, Petr Andreevich Gorbounov, Ziad Ajaltouni, Christoph Langenbruch, Gianluigi Casse, Mikhail Mikhasenko, Andrea Bizzeti, Angelo Loi, Jonathan Plews, Vladimir Macko, P. De Simone, Gerwin Meier, B. Spaan, J. Closier, A. Massafferri, C. Chen, Yonghui Zhou, Marco Cattaneo, Roel Aaij, Jana Crkovská, Vadym Denysenko, Dong Xiao, Guido Andreassi, Marco Santimaria, David Anthony Friday, Stefano Cali, George Coombs, A. Jawahery, Marcin Kucharczyk, Maximilien Chefdeville, G. Raven, D. Decamp, A. Golutvin, Darya Savrina, Tatiana Ovsiannikova, Arthur Marius Hennequin, S. Kandybei, J. A. B. Coelho, C. Vázquez Sierra, P. Spradlin, S. Ogilvy, Da Yu Tou, F. Teubert, T. Kirn, E. Gushchin, Heather Mckenzie Wark, I. Nasteva, C. Sanchez Mayordomo, E. Jans, Michele Piero Blago, Srishti Bhasin, A. Casais Vidal, R. Currie, Carmelo D'Ambrosio, Jean François Marchand, Agnieszka Oblakowska-Mucha, H. V. Cliff, Ming Zeng, Tommaso Pajero, R. Cenci, M. De Cian, M. Rama, F. Fontanelli, Michele Veronesi, Biplab Dey, Serena Maccolini, Yawen Wang, Alexsei Chubykin, Oleg Stenyakin, Federico Alessio, Sook Hyun Lee, S. Hansmann-Menzemer, M. S. Rangel, Gerd Joachim Kunde, Liupan An, R. Vazquez Gomez, F. F. Wilson, N. Neri, A. Gomes, Federico Betti, A. Büchler-Germann, Chenxi Gu, S. Meloni, L. A. Granado Cardoso, D. R. Johnson, Harris Conan Bernstein, Sebastian Neubert, A. Dziurda, R. Graciani Diaz, B. Quintana, Andreas Güth, C. Bozzi, Martina Ferrillo, Alex Seuthe, A. Schopper, Maria Flavia Cicala, Oleksander Kot, M. Vieites Diaz, C. Fitzpatrick, Mika Vesterinen, W. Baldini, Razvan Daniel Moise, C. A. Aidala, G. Punzi, Margarete Schellenberg, Peter Svihra, T. D. Nguyen, Lucio Anderlini, L. Del Buono, R. Mountain, Diego Alejandro Milanes, Jakub Moron, Maciej Witold Majewski, C. R. Jones, Matthew Scott Rudolph, Gennady Panshin, M. Poli Lener, Claire Prouve, Neville Harnew, K. Carvalho Akiba, M. Andreotti, M. J. Morello, P. Perret, Sergey Barsuk, Oliver Lantwin, Aleksandr Petrov, A. Puig Navarro, E. Santovetti, Tatiana Gaintseva, Margarita Stepanova, Kodassery Prasanth, Martha Hilton, F. Archilli, M. Tobin, Mark Richard James Williams, J. M. Yu, Marco Adinolfi, Cynthia Nunez, Qiang Xu, G. Carboni, M. T. Tran, C. Haen, Mikhail Zavertyaev, Nikita Kazeev, John Matthew Durham, A. Dovbnya, R. Santacesaria, N. Sagidova, A. Fernandez Prieto, Emmy Gabriel, Fabrice Desse, Benedetto Gianluca Siddi, Krzysztof Swientek, Yuezhe Yao, Huacheng Cai, François Fleuret, Lain-Jong Li, Nicola Skidmore, Vasyl Dobishuk, B. Leverington, M. Chrzaszcz, T. Lesiak, V. Belavin, Murdo Traill, L. Giubega, A. Oyanguren, D. E. Hutchcroft, X. Han, I. A. Monroy, Davide Fazzini, J. J. Walsh, Davide Lancierini, Franco Bedeschi, E. Tournefier, Stanislav Poslavskii, Stephane T'Jampens, Ina Carli, Artem Maevskiy, Jascha Peter Grabowski, Vlad-Mihai Placinta, C. B. Van Hulse, B. Malecki, V. Chekalina, Oleg Yushchenko, Marcel Materok, O. Maev, Konrad Klimaszewski, Marta Calvi, Andreas Weiden, J. Maratas, Ifan Williams, R. Nandakumar, L. Garrido, V. Shevchenko, J. V. Viana Barbosa, Yu. Guz, G. Alkhazov, Yiheng Luo, Ekaterina Trifonova, William Barter, Martina Pili, Thomas N. Williams, Francesco Dettori, Daniel Patrick O'Hanlon, l. Soares Lavra, P. Fernandez Declara, K. De Bruyn, David Gerick, S. Sellam, J. Ruiz Vidal, Deepanwita Dutta, Andrea Merli, Jennifer Brigitta Zonneveld, V. V. Gligorov, Abhijit Mathad, Kurt Rinnert, Xiaofeng Zhu, C. Remon Alepuz, A. Papanestis, M. J. Bradley, Tomasz Skwarnicki, A. Grecu, T. J. V. Bowcock, Anatoly Konoplyannikov, Angelo Carbone, Jaap Velthuis, Zishuo Yang, Hans Dembinski, M. Palutan, M. Ramos Pernas, Jacopo Cerasoli, M. Pepe Altarelli, Gediminas Sarpis, Thomas Harrison, Timon Schmelzer, Edward James Millard, Marco Gersabeck, Mikhail Hushchyn, Julien Cogan, M. O. Bettler, Xuhao Yuan, Simon Nieswand, Jiayin Sun, L. Zhang, M. Brodski, S.-G. Chitic, Adam Benjamin Morris, Vitalii Lisovskyi, Annarita Buonaura, Valery Zhukov, Dmitrii Maisuzenko, Stefano Petrucci, Renato Quagliani, T. J. Gershon, Anna Lupato, A. Falabella, M. Sarpis, Milosz Zdybal, Hans Dijkstra, Sebastian Bachmann, Markus Frank, Andrey Ustyuzhanin, Georgios Chatzikonstantinidis, Samuel Maddrell-Mander, Sophie Katharina Kretzschmar, M. Calvo Gomez, A. A. Alves, Bernardo Adeva, Samuel Coquereau, S. Monteil, G. Wilkinson, Dana Bobulska, Hangyi Wu, Biagio Saitta, Paul Andre Günther, S. Simone, Elie Aslanides, Guillaume Pietrzyk, Maxim Borisyak, Mark Slater, Varvara Batozskaya, N. Tuning, Violaine Bellee, William Dean, I. V. Gorelov, K. Müller, Giovanni Bassi, Kenenbek Arzymatov, Christopher Betancourt, S. Ferreres Sole, C. Göbel, Maciej Wojciech Dudek, R. Matev, George Holger Lovell, R. Manera Escalero, B. Rachwal, Victor Egorychev, G. Corti, Pavol Stefko, Martin Stefan Bieker, Alessandra Gioventù, Florian Reiss, S. Malde, Jonas Nathanael Eschle, S. Perazzini, M. Franco Sevilla, P. Durante, Giacomo Vitali, A. Bursche, Daniel Charles Craik, J. J. Xu, Stephan Escher, Patrick Koppenburg, Alexander Vagner, Anna Danilina, Karlis Dreimanis, A. F. Campoverde Quezada, E. Ben-Haim, R. Calabrese, P. Gandini, Luca Pescatore, V. Obraztsov, A. Satta, David Loh, Andrii Usachov, Marco Pappagallo, Eliane Epple, M. Rotondo, Serhii Cholak, Renata Kopecna, V. Gibson, Serhii Koliiev, Nikolai Voropaev, Dmitrii Pereima, Manuel Schiller, Emma Buchanan, R. McNulty, Hongjie Mu, P. Krokovny, Lauren Douglas, Adam Davis, S. Ricciardi, Fedor Ratnikov, Ulrik Egede, Cedric Meaux, M. Lucio Martinez, Stephan Eisenhardt, B. D. C. Westhenry, Sandro Cadeddu, L. Shekhtman, Maciej Pawel Szymanski, Jiangqiao Hu, Maxime Schubiger, Christoph Frei, Igor Skiba, Eduardo Rodrigues, Marianna Fontana, Alexandra Paige Rollings, John Leslie Cobbledick, John Back, G. Simi, G. Passaleva, Svende Braun, Paul Seyfert, Xixin Liang, Matthieu Kecke, D. Hill, Victor Renaudin, P. Alvarez Cartelle, Michal Dziewiecki, Ignacio Bediaga, Desmond Mzamo Shangase, Christopher Burr, Wojciech Krupa, T. Ruf, Y. Li, A. Lai, Andrea Mauri, Simon Stemmle, Wenbin Qian, Joseph David Shupperd, D. Melnychuk, X. J. Zhou, S. Farry, J. M. Otalora Goicochea, Piera Muzzetto, Hannah Louise Pullen, Wolfgang Funk, Li Xu, M. Korolev, J. He, Surapat Ek-In, Thomas Ackernley, R. Schwemmer, Tai-hua Lin, Sandra Amato, A. Bondar, D. Vom Bruch, Salvatore Aiola, Philip Ilten, C. Satriano, S. Playfer, Naomi Cooke, O. Steinkamp, O. De Aguiar Francisco, Adalberto Sciubba, Olli Lupton, Andrea Mogini, K. Belous, S. De Capua, Jolanta Brodzicka, Biljana Mitreska, Matthew George Chapman, G. Lanfranchi, M.-N. Minard, Jonas Rademacker, A. Contu, Victor Coco, S. Easo, G. D. Lafferty, Miroslaw Firlej, Lauren Emma Yeomans, P. Campana, Hongxi Xing, Ia. Bezshyiko, Nikolay Nikitin, A. Vollhardt, Emilie Maurice, Patrick Robbe, Kristian Alexander Zarebski, Michael Alexander, Thomas Henry Hancock, Patrick Owen, Olivier Leroy, E. Grauges, Roberta Cardinale, Martino Borsato, E. van Herwijnen, A. Vorobyev, Barbara Sciascia, Zhuoming Li, Ivan Polyakov, Loris Martinazzoli, Daniel Stephen Richards, Jozef Tomasz Borsuk, Laurent Dufour, M. Dorigo, Quentin Fuehring, Paolo Carniti, Alexander Semennikov, Frank Ferrari, F. Dordei, Meril Reboud, Stephen M. Stahl, James Mwangi Kariuki, D. Zhang, Zhiyu Xiang, Nicola Serra, N. Neufeld, Philippe d'Argent, Jordan Daniel Roth, W. Huang, Alexander Berezhnoy, Ao Xu, Mara Senghi Soares, J. García Pardiñas, R. Lindner, P. E. L. Clarke, X. Cid Vidal, F. Muheim, John Gordon Smeaton, L. Ferreira Lopes, Phillip John Marshall, F. Maciuc, Wojciech Krzemien, M. Shapkin, Elisabeth Maria Niel, M. Mukherjee, Hossein Afsharnia, M. R. J. Williams, E. Spadaro Norella, Alexandru Ene, E. Thomas, Sebastien Ponce, Andrew Beiter, Sofia Kotriakhova, C. Hasse, B. Schmidt, Sara Celani, M. Veltri, G. Haefeli, Kayleigh Anne Thomson, D. Campora Perez, Cameron Thomas Dean, B. Souza De Paula, Daniele Manuzzi, A. C. dos Reis, L. Calero Diaz, Yuyue Gan, Anatoly Butkevich, Ivan Belyaev, U. Marconi, A. G. Morris, Federico Cindolo, Evelina Gersabeck, Roger Forty, V. Kudryavtsev, D. R. Ward, Brij Kishor Jashal, A. Palano, Tomasz Szumlak, Adam Dendek, B. Garcia Plana, Anastasia Smetkina, Alexander Battig, Kevin Heinicke, Daniel Berninghoff, S. Filippov, Samuel Belin, Aravindhan Venkateswaran, Jia-Jia Qin, Jan-Marc Basels, A. Artamonov, Donal Murray, Kara Renee Mattioli, M. Cruz Torres, C. Gaspar, Jing Wang, Sara Elizabeth Mitchell, Andrew Crocombe, Z. Mathe, Veronika Chobanova, Valery Pugatch, Benjamin Audurier, Denis Derkach, G. Mancinelli, L. De Paula, Baasansuren Batsukh, C. Parkes, Silvia Gambetta, F. Ferreira Rodrigues, S. Gallorini, D. Martinez Santos, J. Z. Fan, Lukas Witola, Antonino Sergi, Felix Johannes Kress, Shantam Taneja, T. Boettcher, A. Brea Rodriguez, Mark Whitehead, V. Vorobyev, M. Romero Lamas, M. Ferro-Luzzi, L. L. Pappalardo, P. Camargo Magalhaes, G. Manca, O. Schneider, Yanting Fan, Natalia Polukhina, S. Tolk, Giulia Tuci, Alex Pearce, Matteo Bartolini, Pietro Albicocco, T. E. Latham, L. Kravchuk, Roman Greim, Vladimir Romanovskiy, A. Zhelezov, Luca Minzoni, Dylan Jaide White, Lucas Mcconnell, F. J. P. Soler, R. Jacobsson, Rafal Dominik Krawczyk, D. Websdale, Mark Hatch, S. C. Haines, L. M. Garcia Martin, B. Couturier, R. A. Fini, M. Xu, Claudia Bertella, Arseniy Vitkovskiy, Aleksandra Snoch, D. Wiedner, A. Romero Vidal, Daniele Marangotto, Karol Hennessy, Constantin Weisser, Miroslav Saur, Alexey Boldyrev, Iwan Thomas Smith, C. M. Costa Sobral, A. Hicheur, S. Vecchi, F. Stagni, M. De Serio, D. Lacarrere, C. L. Da Silva, Johannes Heuel, Thibaud Humair, M. McCann, Sebastian Schulte, R. I. Rabadan Trejo, L. G. Scantlebury Smead, C. Abellán Beteta, Carina Trippl, Lucia Grillo, C. Matteuzzi, A. Lusiani, M. Charles, S. Schael, A. Dzyuba, Artem Ryzhikov, Nis Meinert, Alessio Piucci, Shudong Zhang, Alison Tully, Michal Kreps, Sergey Strokov, Francesca M. Pisani, Phoebe Meredith Hamilton, Sergey Didenko, Jan Buytaert, Guillermo Loustau, A. McNab, Holger Stevens, Hang Yin, Roland Bernet, Nikolay Bondar, Sune Jakobsen, Niladribihari Sahoo, A. Tsaregorodtsev, Yasmine Amhis, Xia-Ji Liu, Frederic Machefert, Sheldon Stone, Alessandro Cardini, J. M. De Miranda, B. Jost, Hanna Malygina, Simone Bifani, T. Gys, O. Boente Garcia, Gabriela Johanna Pomery, H. Li, Ph. Ghez, J. D. Osborn, M. Morandin, M. Plo Casasus, P. Di Nezza, S. Klaver, Alexander D. Popov, Tengiz Kvaratskheliya, J. J. Saborido Silva, B. R. Gruberg Cazon, J. Marks, Antje Mödden, M. Straticiuc, H. W. Van Hecke, Ross John Hunter, Marco Clemencic, Luyan Sun, Mikkel Bjørn, F. A. Garcia Rosales, Michael Becker, Dmitry Golubkov, Tara Shears, U. Uwer, L. Silva de Oliveira, Anton Poluektov, Lorenzo Sestini, Ryan Calladine, Dominik Stefan Mitzel, Gianfranco Morello, Preema Rennee Pais, Pawel Kopciewicz, Claudio Gotti, Plamen Hristov Hopchev, E. Govorkova, Harald Viemann, Dominik Müller, V. Bocci, Patrick Mackowiak, Alexander Leflat, L. R. Madhan Mohan, Lesya Shchutska, Floris Keizer, D. Pinci, Jihyun Bhom, Mariia Poliakova, Roger Barlow, Igor Kostiuk, Blaise Delaney, Simon Baker, L. Tomassetti, E. Cogneras, Adam Szabelski, A. Ukleja, Laura Promberger, E. Dall’Occo, Antonio Pellegrino, S. A. Wotton, John Jake Lane, F. Redi, E. Polycarpo, Tatsuya Nakada, Rudolf Oldeman, Konstantin Gizdov, Wiktor Byczynski, G. Bencivenni, Alessio Sarti, M. Martinelli, M. Fiorini, S. Stracka, V. Vagnoni, E. Luppi, A. Gallas Torreira, Michele Atzeni, G. Liu, Moran Wang, P. Billoir, Ying Lu, Mark Wilkinson, Roland Waldi, Timofei Maltsev, J. Serrano, Zan Ren, Feng Jiang, Matthieu Marinangeli, S. J. Chen, Jacopo Pinzino, Wen Chao Zhang, C. Sanchez Gras, Anna Ossowska, Nathan Jurik, D. Lucchesi, M. Patel, Anastasiia Kharisova, Michael Sokoloff, Federico Lazzari, N. K. Watson, Marie Helene Schune, James Vincent Mead, Sean Benson, Emilie Bertholet, Xiao-Rui Lyu, Xiao-yan Li, Olivier Deschamps, Niklas Stefan Nolte, Alexander Baranov, Tobias Tekampe, Dawid Gerstel, Eluned Smith, I. Longstaff, Sophie Richards, Malte Hecker, Almagul Kondybayeva, D. Hynds, D. Galli, F. Martinez Vidal, Marina Artuso, W. Wislicki, Tjeerd Ketel, C. Santamarina Rios, Titus Mombächer, Thomas Grammatico, J. Fu, M. van Veghel, G. Martellotti, Petr Fedin, Andrea Valassi, Tara Nanut, W. D. Hulsbergen, Konstantinos Petridis, J. A. Rodriguez Lopez, A. Brossa Gonzalo, Matthew Kenzie, P. Gironella Gironell, Xavier Vilasis-Cardona, Lukas Gruber, and R. Le Gac

Subjects
Physics, Particle physics, Large Hadron Collider, Muon, Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), General Physics and Astronomy, Observable, 01 natural sciences, Luminosity, Standard Model, Angular distribution, 0103 physical sciences, Invariant mass, 010306 general physics
Abstract

An angular analysis of the B^{0}→K^{*0}(→K^{+}π^{-})μ^{+}μ^{-} decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb^{-1} of pp collision data collected with the LHCb experiment. The full set of CP-averaged observables are determined in bins of the invariant mass squared of the dimuon system. Contamination from decays with the K^{+}π^{-} system in an S-wave configuration is taken into account. The tension seen between the previous LHCb results and the standard model predictions persists with the new data. The precise value of the significance of this tension depends on the choice of theory nuisance parameters.

Published
2020
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17. Observation of New Ξc0 Baryons Decaying to Λc+K−

Author

S. Vecchi, Alessio Piucci, Carmelo D'Ambrosio, Jean François Marchand, Yasmine Amhis, Gabriela Johanna Pomery, M. Morandin, Markus Frank, Alexey Boldyrev, J. J. Xu, Karlis Dreimanis, R. Calabrese, Alexander Semennikov, S. Esen, Kevin Heinicke, Kara Renee Mattioli, M. Cruz Torres, U. Uwer, Oleg Stenyakin, C. Marin Benito, Mika Vesterinen, Wojciech Kucewicz, Samuel Belin, Arseniy Vitkovskiy, P. Durante, Margarita Stepanova, I. Longstaff, F. Martinez Vidal, Marco Adinolfi, Tjeerd Ketel, Dmitry Popov, Simon Akar, A. Bay, A. Fernandez Prieto, C. A. Aidala, L. Del Buono, Emilie Bertholet, Emmy Gabriel, Xiao-Rui Lyu, Hannah Louise Pullen, M. Korolev, J. He, Surapat Ek-In, S. Easo, Miroslaw Firlej, G. Valenti, Kuzma Ivshin, Benedetto Gianluca Siddi, Jonas Rademacker, Jascha Peter Grabowski, V. Shevchenko, A. Romero Vidal, Constantin Weisser, S. Eidelman, Christopher Burr, Mick Mulder, L. Tomassetti, Marco Santimaria, R. Currie, S. Hansmann-Menzemer, H. Li, Philipp Ibis, Adam Szabelski, A. Ukleja, Antonio Pellegrino, Stephane T'Jampens, Gerd Joachim Kunde, F. Redi, A. Schopper, E. Polycarpo, Tatsuya Nakada, G. Bencivenni, Giacomo Vitali, Stephan Escher, Vlad-Mihai Placinta, Patrick Koppenburg, Yiheng Luo, Michele Atzeni, Deepanwita Dutta, G. Liu, J. Fu, Murdo Traill, C. Sanchez Mayordomo, B. T. Meadows, Moran Wang, D. Vom Bruch, G. Raven, D. Decamp, L. Garrido, A. Golutvin, Matthew Kelsey, Jordy Sebastiaan Butter, Stefano Petrucci, A. Petrolini, Lauren Emma Yeomans, M. D. Sokoloff, P. Campana, Oleksander Kot, Hongxi Xing, R. Mountain, Andrea Valassi, Paolo Carniti, Meril Reboud, Tara Nanut, F. Blanc, R. Lefèvre, Jennifer Brigitta Zonneveld, T. Lesiak, Mark Hatch, C. M. Costa Sobral, Johannes Heuel, B. D. C. Westhenry, Sebastian Schulte, Igor Kostiuk, V. V. Gligorov, Sandro Cadeddu, Jozef Tomasz Borsuk, Stephen M. Stahl, H. V. Cliff, Kenenbek Arzymatov, Federico Alessio, S. H. Lee, Tobias Tekampe, Marco Petruzzo, Hans Dembinski, Dawid Gerstel, Marcin Kucharczyk, Maximilien Chefdeville, Eluned Smith, G. Graziani, Matthew Kenzie, David Gascon, J. Lomba Castro, P. Vazquez Regueiro, Alexander Berezhnoy, Xavier Vilasis-Cardona, D. Melnychuk, S. Meloni, Marian Stahl, Naomi Veronika Raab, E. Grauges, Pavol Stefko, Qiang Xu, Konstantin Gizdov, Wiktor Byczynski, M. Martinelli, N. Neufeld, William Barter, Martina Pili, M. T. Tran, Sophie Richards, Malte Hecker, Almagul Kondybayeva, D. Hynds, D. Galli, R. Santacesaria, X. J. Zhou, Thomas Ackernley, Viacheslav Matiunin, L. Ferreira Lopes, X. Han, Andreas Weiden, L. Zhang, Jana Crkovská, D. R. Johnson, P. Gandini, Maciej Witold Majewski, C. R. Jones, A. G. Morris, Matthew Scott Rudolph, Renato Quagliani, C. Göbel, Yonghui Zhou, Marco Cattaneo, P. Billoir, Nikolai Voropaev, David Loh, Vladimir Macko, I. Nasteva, Angelo Carbone, Jaap Velthuis, I. A. Monroy, Matthieu Kecke, M. Patel, Anastasiia Kharisova, Federico Lazzari, A. Vollhardt, N. K. Watson, Marie Helene Schune, Marco Guarise, Alexandre Boyer, A. F. Campoverde Quezada, Kristian Alexander Zarebski, Michael Alexander, O. De Aguiar Francisco, Thomas Henry Hancock, Sofia Kotriakhova, C. Hasse, S. Ferreres Sole, V. Gibson, James Vincent Mead, Naomi Cooke, Loris Martinazzoli, Nikolay Bondar, Ph. Ghez, A. Sciubba, J. D. Osborn, Tengiz Kvaratskheliya, Nikita Kazeev, Marina Artuso, W. Wislicki, Ao Xu, Mara Senghi Soares, J. García Pardiñas, O. Steinkamp, E. Spadaro Norella, Federico Cindolo, Roger Forty, Alexander Battig, Lukas Witola, Roman Greim, Da Yu Tou, Adam Davis, Victor Renaudin, Florian Reiss, S. Malde, Jonas Nathanael Eschle, A. Dovbnya, C. Parkes, Silvia Gambetta, T. J. Gershon, C. Santamarina Rios, Titus Mombächer, Thomas Grammatico, R. Silva Coutinho, Ryan Newcombe, Barbara Sciascia, E. Ben-Haim, Elie Aslanides, B. R. Gruberg Cazon, J. Marks, Antje Mödden, M. Straticiuc, Lukas Gruber, Cameron Thomas Dean, B. Souza De Paula, T. Ruf, F. Teubert, N. Neri, Alex Seuthe, R. Lindner, Elisabeth Maria Niel, Adam Dendek, R. Le Gac, P. Alvarez Cartelle, B. Garcia Plana, V. Franco Lima, Gediminas Sarpis, W. Baldini, Anastasia Smetkina, J. J. Walsh, Davide Lancierini, F. Stagni, Francesca M. Pisani, Phoebe Meredith Hamilton, Sandra Amato, A. Bondar, Daniel Patrick O'Hanlon, Maxime Schubiger, S. Filippov, Lain-Jong Li, Samuel Coquereau, Evgenii Shmanin, V. Vorobyev, M. van Veghel, G. Martellotti, Alexander Vagner, Anna Danilina, Jordan Daniel Roth, Hossein Afsharnia, Cedric Meaux, M. R. J. Williams, Ignacio Bediaga, Desmond Mzamo Shangase, Simon Stemmle, Y. Li, J. A. de Vries, G. Wilkinson, D. Martinez Santos, J. Z. Fan, N. Tuning, Matthew James Tilley, Violaine Bellee, William Dean, Alessandra Gioventù, F. J. P. Soler, R. Schwemmer, Nathanael Farley, Jan Buytaert, Mark Whitehead, K. Belous, J. M. Otalora Goicochea, Piera Muzzetto, Wolfgang Funk, Paul Andre Günther, M. Plo Casasus, S. Playfer, Carmen Giugliano, Silvia Borghi, M. Karacson, S. C. Haines, M. Romero Lamas, M. Ferro-Luzzi, L. L. Pappalardo, A. Hicheur, P. Camargo Magalhaes, Sean Benson, Petr Fedin, Frank Ferrari, Hangyi Wu, Guido Andreassi, Agnieszka Oblakowska-Mucha, Xiao-yan Li, Alexandru Ene, E. Thomas, Qundong Han, G. Lanfranchi, M.-N. Minard, Mark Richard James Williams, Jakub Moron, T. J. V. Bowcock, James Mwangi Kariuki, A. Vorobyev, M. Witek, F. Dordei, Jolanta Brodzicka, Biljana Mitreska, Lucas Mcconnell, M. Rotondo, M. Needham, M. De Serio, Serhii Cholak, Renata Kopecna, D. Lacarrere, Mikhail Zavertyaev, Olivier Deschamps, Niklas Stefan Nolte, C. L. Da Silva, M. McCann, W. D. Hulsbergen, G. Manca, Konstantinos Petridis, Carina Trippl, J. A. Rodriguez Lopez, S. Gallorini, O. Schneider, Natalia Polukhina, Yunyun Fan, Ryan Calladine, L. Kravchuk, Matthew George Chapman, Martina Ferrillo, Louis Henry, Emilie Maurice, Nicola Skidmore, Vasyl Dobishuk, Giovanni Passaleva, Hilbrand Steffen Kuindersma, Lucia Grillo, Zhiyu Xiang, Laurent Dufour, Kodassery Prasanth, G. Alkhazov, E. Tournefier, Stanislav Poslavskii, Plamen Hristov Hopchev, G. D. Lafferty, Julien Cogan, Alessandro Cardini, C. Matteuzzi, A. McNab, A. Brossa Gonzalo, P. Gironella Gironell, J. M. De Miranda, C. Chen, L. R. Madhan Mohan, Lesya Shchutska, J. Baptista Leite, Ying Lu, Tomasz Fiutowski, X. Cid Vidal, F. Muheim, Konrad Klimaszewski, David Gerick, John Gordon Smeaton, Anatoly Konoplyannikov, Mikhail Hushchyn, Patrick Owen, P. Collins, Y. Sun, M. Tobin, Martino Borsato, M. Xu, M. De Cian, Johannes Albrecht, J. Ruiz Vidal, Dominik Stefan Mitzel, Gianfranco Morello, Preema Rennee Pais, Pawel Kopciewicz, D. Zhang, Malcolm John, Gerwin Meier, Karol Hennessy, Roland Bernet, L. G. Scantlebury Smead, M. Gandelman, M. Rama, F. Fontanelli, Michele Veronesi, M. Charles, Claudio Gotti, Krzysztof Swientek, Dominik Müller, E. Cogneras, E. Dall’Occo, E. Golobardes, Christopher John Parkinson, M. Veltri, G. Haefeli, Tommaso Colombo, Mark Wilkinson, Roland Waldi, Franco Bedeschi, Xuhao Yuan, Kurt Rinnert, Jiayin Sun, Y. Gao, A. Alfonso Albero, E. van Herwijnen, S. Kandybei, J. A. B. Coelho, Daniel Vieira, S. Stracka, T. Kirn, R. Matev, Basem Khanji, Y. Xie, Thomas Blake, Ming Zeng, Tommaso Pajero, R. Cenci, S.-G. Chitic, Adam Benjamin Morris, Milosz Zdybal, B. Rachwal, V. Vagnoni, E. Luppi, P. Fernandez Declara, Timofei Maltsev, L. Calero Diaz, J. Serrano, H. Schindler, Marek Idzik, G. Wormser, Sara Celani, Victor Egorychev, S. A. Wotton, John Jake Lane, Georgios Chatzikonstantinidis, Yuyue Gan, Anatoly Butkevich, Sophie Katharina Kretzschmar, M. Calvo Gomez, Vladimir Chulikov, Guillaume Pietrzyk, Maciej Wojciech Dudek, G. Corti, Thomas Hadavizadeh, Dmitrii Pereima, Yawen Wang, A. Dziurda, K. De Bruyn, S. Sellam, Samuel Maddrell-Mander, R. Graciani Diaz, Claire Prouve, Neville Harnew, M. van Beuzekom, C. Vázquez Sierra, A. Büchler-Germann, Timon Schmelzer, Zan Ren, Sebastian Neubert, Scott Ely, Maria Elena Stramaglia, Feng Jiang, Matthieu Marinangeli, A. Bursche, Martin Stefan Bieker, Aravindhan Venkateswaran, Jia-Jia Qin, Andrii Usachov, Marco Pappagallo, Daniel Charles Craik, S. Ricciardi, Yuezhe Yao, Huacheng Cai, Rudolf Oldeman, Martha Hilton, F. Archilli, Fedor Ratnikov, Ilaria Neri, Valery Pugatch, S. J. Chen, Jacopo Pinzino, Wen Chao Zhang, Davide Fazzini, C. Sanchez Gras, Cynthia Nunez, E. Gushchin, Sara Elizabeth Mitchell, Andrew Crocombe, Z. Mathe, B. Malecki, Christoph Frei, Chenxi Gu, K. Carvalho Akiba, R. McNulty, Paul Seyfert, Ekaterina Trifonova, P. Krokovny, R. Nandakumar, Anna Ossowska, Nathan Jurik, D. Lucchesi, Veronika Chobanova, l. Soares Lavra, Vladimir Romanovskiy, A. Zhelezov, G. Carboni, A. Gallas Torreira, Anna Lupato, T. E. Latham, M. Pepe Altarelli, G. Punzi, Eduardo Rodrigues, D. E. Hutchcroft, Marcel Materok, Thomas Harrison, S. Monteil, Edward James Millard, Marco Gersabeck, Miroslav Saur, George Holger Lovell, R. Manera Escalero, D. Hill, J. Maratas, Gennady Panshin, Ifan Williams, A. Lusiani, Michal Dziewiecki, I. V. Gorelov, K. Müller, Giovanni Bassi, M. Poli Lener, Tai-hua Lin, Manuel Schiller, Lauren Douglas, Li Xu, M. Ramos Pernas, Vitalii Lisovskyi, T. Gys, Andrea Mogini, Sergey Didenko, Simone Bifani, Wojciech Krupa, A. A. Alves, P. Di Nezza, S. Klaver, S. Perazzini, M. Franco Sevilla, Alexey A. Petrov, Olli Lupton, S. De Capua, J. J. Saborido Silva, K. Wyllie, Fabrice Desse, Joseph David Shupperd, Ia. Bezshyiko, B. Pietrzyk, Nikolay Nikitin, Igor Skiba, A. Lai, Andrea Mauri, Wenbin Qian, Daniel Stephen Richards, D. Savrina, Philippe d'Argent, Cheryl Pappenheimer, M. Merk, S. Farry, P. E. L. Clarke, Sebastien Ponce, Kayleigh Anne Thomson, Daniele Manuzzi, A. C. dos Reis, Y. H. Zheng, C. J. G. Onderwater, Emma Buchanan, Lars Eklund, Alexander Inglessi, Hongjie Mu, Elena Graverini, Ziad Ajaltouni, M. Dorigo, Michele Piero Blago, Salvatore Aiola, Philip Ilten, Andreas Güth, Margarete Schellenberg, Peter Svihra, T. D. Nguyen, Vladislav Balagura, N. Sagidova, L. De Paula, Baasansuren Batsukh, P. Spradlin, Felix Johannes Kress, Shantam Taneja, Roberta Cardinale, Kevin Heijhoff, Lorenzo Capriotti, A. Jawahery, M. Bartolini, Razvan Daniel Moise, J. M. Yu, Christoph Langenbruch, M. Shapkin, Gianluigi Casse, Angelo Loi, B. Schmidt, Ivan Belyaev, Jan-Marc Basels, A. Artamonov, E. Jans, Brij Kishor Jashal, Srishti Bhasin, Tara Shears, L. Silva de Oliveira, Anton Poluektov, Lorenzo Sestini, D. Wiedner, E. Govorkova, Harald Viemann, Alexander Leflat, Iwan Thomas Smith, M. S. Rangel, Liupan An, R. Vazquez Gomez, A. Palano, Tomasz Szumlak, Blaise Delaney, Laura Promberger, Alessio Sarti, M. Fiorini, A. Dzyuba, Guillermo Loustau, O. Maev, Simon Nieswand, Annarita Buonaura, Valery Zhukov, Abhijit Mathad, Tomasz Skwarnicki, Sebastian Bachmann, R. Jacobsson, Rafal Dominik Krawczyk, S. Simone, V. Obraztsov, Diego Alejandro Milanes, M. Lucio Martinez, Stephan Eisenhardt, Christopher Betancourt, Thibaud Humair, A. Satta, R. I. Rabadan Trejo, Ulrik Egede, Ivan Polyakov, M. Brodski, F. Maciuc, Svende Braun, M. J. Morello, Daniel Berninghoff, C. Satriano, A. Contu, Olivier Leroy, P. Perret, Sune Jakobsen, Eliane Epple, Sergey Barsuk, Oliver Lantwin, Luca Minzoni, Dylan Jaide White, Claudia Bertella, A. Di Canto, Aleksandra Snoch, Harris Conan Bernstein, Holger Stevens, Hang Yin, O. Boente Garcia, C. Bozzi, A. Puig Navarro, François Fleuret, B. Leverington, M. Chrzaszcz, L. Giubega, A. Oyanguren, Alexander D. Popov, R. J. Barlow, Marta Calvi, Nicola Serra, Thomas N. Williams, Francesco Dettori, Andrew Beiter, U. Marconi, A. Falabella, M. Sarpis, Biagio Saitta, Ross John Hunter, Michael Becker, Serhii Koliiev, Dmitry Golubkov, Alexandra Paige Rollings, John Leslie Cobbledick, G. Simi, V. Bocci, Lucian Cojocariu, Mark Smith, Patrick Mackowiak, A. Bertolin, Aleksei Chernov, Floris Keizer, D. Pinci, Jihyun Bhom, Mariia Poliakova, Simon Baker, K. E. Kim, William Parker, F. Polci, G. Mancinelli, Conor Fitzpatrick, Antonino Sergi, T. Boettcher, A. Brea Rodriguez, D. Websdale, L. M. Garcia Martin, B. Couturier, R. A. Fini, C. Abellán Beteta, Jakub Ryzka, Robert Hart, Timothy Evans, M. Vieites Diaz, S. Schael, Niladribihari Sahoo, A. Tsaregorodtsev, Lucio Anderlini, Ina Carli, Xiaofeng Zhu, C. Remon Alepuz, A. Papanestis, Xia-Ji Liu, Frederic Machefert, Sheldon Stone, A. Grecu, Andrey Ustyuzhanin, J. J. Back, Bernardo Adeva, Marianna Fontana, Davide Brundu, Colm Harold Murphy, Patrick Robbe, Quentin Fuehring, Phillip John Marshall, Arnaud Robert, C. Patrignani, Wojciech Krzemien, Evelina Gersabeck, Markus Roehrken, V. Tisserand, M. Andreotti, Benjamin Audurier, Denis Derkach, F. Ferreira Rodrigues, Giulia Tuci, Tatiana Ovsiannikova, Ph. Charpentier, Arthur Marius Hennequin, S. Ogilvy, Alexander Malinin, Heather Mckenzie Wark, A. B. Rodrigues, P. Naik, David Anthony Friday, Stefano Cali, George Coombs, F. F. Wilson, Mauricio Féo, A. Gomes, Federico Betti, L. A. Granado Cardoso, Maria Flavia Cicala, Petr Andreevich Gorbounov, A. Casais Vidal, L. Meyer Garcia, Pietro Marino, M. Schmelling, Dong Xiao, B. Quintana, Yu. Guz, Jonathan Plews, P. De Simone, E. Santovetti, Tatiana Gaintseva, B. Spaan, J. Closier, A. Massafferri, John Matthew Durham, Biplab Dey, Serena Maccolini, Roel Aaij, Vadym Denysenko, Alexsei Chubykin, J. H. Lopes, Zhipeng Tang, Andrea Merli, Jacopo Cerasoli, Dmitrii Maisuzenko, Hans Dijkstra, Wenhua Hu, Y. Zhang, S. Blusk, Maxim Borisyak, H. F. Schreiner, Saverio Mariani, Z. Xu, Vukan Jevtic, O. V. Mineev, Alessandro Camboni, K. M. Fischer, Fedor Baryshnikov, C. Gaspar, Jing Wang, D. Torres Machado, Alex Pearce, Chung Nguyen-Mau, Daniele Marangotto, Gregory Ciezarek, Alessandro Pastore, Zhenzi Wang, Veronica Soelund Kirsebom, Artem Ryzhikov, Nis Meinert, Shudong Zhang, Alison Tully, Jeremy Dalseno, Michal Kreps, Sergey Strokov, B. Jost, Giovanni Cavallero, Stefano Zucchelli, Hanna Malygina, P. Griffith, C. Haen, Artem Maevskiy, C. B. Van Hulse, Paolo Ciambrone, V. Chekalina, Oleg Yushchenko, J. V. Viana Barbosa, M. J. Bradley, H. W. Van Hecke, Marco Clemencic, Zishuo Yang, M. Palutan, Luyan Sun, Mikkel Bjørn, F. A. Garcia Rosales, Mark Slater, Mikhail Mikhasenko, Andrea Bizzeti, M. O. Bettler, Vladislav Belavin, Varvara Batozskaya, Dana Bobulska, L. Shekhtman, Maciej Pawel Szymanski, Jiangqiao Hu, Xixin Liang, Victor Coco, Zhuoming Li, W. Huang, M. Mukherjee, D. Campora Perez, V. Kudryavtsev, D. R. Ward, Donal Murray, and S. Tolk

Subjects
Quantum chromodynamics, Physics, Quark model, Strong interaction, General Physics and Astronomy, State (functional analysis), 01 natural sciences, Luminosity, Baryon, Crystallography, 0103 physical sciences, Mass spectrum, 010306 general physics, Energy (signal processing)
Abstract

The Λ_{c}^{+}K^{-} mass spectrum is studied with a data sample of pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb^{-1} collected by the LHCb experiment. Three Ξ_{c}^{0} states are observed with a large significance and their masses and natural widths are measured to be m[Ξ_{c}(2923)^{0}]=2923.04±0.25±0.20±0.14 MeV, Γ[Ξ_{c}(2923)^{0}]=7.1±0.8±1.8 MeV, m[Ξ_{c}(2939)^{0}]=2938.55±0.21±0.17±0.14 MeV, Γ[Ξ_{c}(2939)^{0}]=10.2±0.8±1.1 MeV, m[Ξ_{c}(2965)^{0}]=2964.88±0.26±0.14±0.14 MeV, Γ[Ξ_{c}(2965)^{0}]=14.1±0.9±1.3 MeV, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ_{c}^{+} mass. The Ξ_{c}(2923)^{0} and Ξ_{c}(2939)^{0} baryons are new states. The Ξ_{c}(2965)^{0} state is in the vicinity of the known Ξ_{c}(2970)^{0} baryon; however, their masses and natural widths differ significantly.

Published
2020
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18. Persistent insulating state at megabar pressures in strongly spin-orbit coupled Sr2IrO4

Author

Chao An, Lili Zhang, Zhaorong Yang, Xuliang Chen, Bowen Zhang, Ranran Zhang, Yifang Yuan, Shuyang Wang, L. E. DeLong, Ying Zhou, Changjin Zhang, Gang Cao, Chunhua Chen, Tao Han, and Yonghui Zhou

Subjects
Diffraction, Electron density, Structural phase, Materials science, Condensed matter physics, Band gap, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, symbols.namesake, Tetragonal crystal system, Electrical resistance and conductance, 0103 physical sciences, symbols, Condensed Matter::Strongly Correlated Electrons, Orthorhombic crystal system, 010306 general physics, 0210 nano-technology, Raman scattering
Abstract

It is commonly anticipated that an insulating state will collapse in favor of an emergent metallic state at high pressures: The average electron density must increase with pressure, while the electronic bandwidth is expected to broaden and fill the insulating energy band gap. Here we report an unusually stable insulating state that persists up to at least 185 GPa in $\mathrm{S}{\mathrm{r}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$, the archetypical spin-orbit-driven ${J}_{\mathrm{eff}\phantom{\rule{0.28em}{0ex}}}=1/2$ insulator. This study shows that the electrical resistance R of single-crystal $\mathrm{S}{\mathrm{r}}_{2}\mathrm{Ir}{\mathrm{O}}_{4}$ initially decreases with applied pressure P, reaches a minimum in the range 32--38 GPa, then abruptly rises to recover the insulating state with increasing P up to 185 GPa. However, evidence of a saturation of R below 80 K for $P\ensuremath{\ge}124\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$ GPa raises the possibility of a low-temperature exotic state. Our synchrotron x-ray diffraction and Raman scattering data show the emergence of the rapid increase in R is accompanied by a structural phase transition from the native tetragonal $I{4}_{1}/acd$ phase to an orthorhombic $Pbca$ phase (with much reduced symmetry) at 40.6 GPa. The clear correspondence of the onset pressures of these two anomalies is key to understanding the stability of the insulating state at megabar pressures: Pressure-induced, structural distortions prevent the expected onset of metallization, despite the sizable volume compression attained at the highest pressure accessed in this study.

Published
2020
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19. Pressure-driven Lifshitz transition in type-II Dirac semimetal NiTe2

Author

Bowen Zhang, Xuliang Chen, Zhaorong Yang, Yonghui Zhou, Chunhua Chen, Shuyang Wang, Ranran Zhang, Mengyao Qi, Chao An, Hao Wu, Ying Zhou, and Yifang Yuan

Subjects
Superconductivity, Diffraction, Physics, Condensed matter physics, Dirac (software), 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Pressure coefficient, Semimetal, symbols.namesake, Electrical resistivity and conductivity, 0103 physical sciences, symbols, 010306 general physics, 0210 nano-technology, Raman spectroscopy, Raman scattering
Abstract

Band engineering in layered transition metal dichalcogenides (TMDs) leads to a variety of emergent phenomena and has obtained considerable attention recently. Transition metal ditelluride ${\mathrm{NiTe}}_{2}$ has been discovered experimentally to be a type-II Dirac semimetal at ambient pressure, and was predicted to display superconductivity in the monolayer limit. Here we systematically investigate the structural and electronic properties of type-II Dirac semimetal ${\mathrm{NiTe}}_{2}$ under high pressure. Room-temperature synchrotron x-ray diffraction and Raman scattering measurements reveal the stability of the pristine hexagonal phase up to 52.2 GPa, whereas both the pressure coefficient and linewidth of Raman mode ${E}_{g}$ exhibit anomalies at a critical pressure ${P}_{\mathrm{c}}\ensuremath{\sim}16\phantom{\rule{0.28em}{0ex}}\mathrm{GPa}$. Meantime, Hall resistivity measurement indicates that the hole-dominated behavior maintains up to 15.6 GPa and transforms into electron-dominated behavior at higher pressures. Our findings consistently demonstrate a pressure-induced Lifshitz transition in type-II Dirac semimetal ${\mathrm{NiTe}}_{2}$.

Published
2020
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20. Effect of pressure on structural and electronic properties of the noncentrosymmetric superconductor Rh2Mo3N

Author

Xuliang Chen, Bowen Zhang, Hao Wu, Chao An, Yifang Yuan, Shuyang Wang, Mingliang Tian, Mengyao Qi, Yonghui Zhou, Changyong Park, Zhaorong Yang, Wensen Wei, Ranran Zhang, Ying Zhou, and Chunhua Chen

Subjects
Physics, Diffraction, Superconductivity, chemistry.chemical_element, 02 engineering and technology, Nitride, 021001 nanoscience & nanotechnology, Coupling (probability), 01 natural sciences, Crystallography, chemistry, Octahedron, Molybdenum, Condensed Matter::Superconductivity, Phase (matter), 0103 physical sciences, 010306 general physics, 0210 nano-technology, Electronic properties
Abstract

Noncentrosymmetric molybdenum nitride $\mathrm{R}{\mathrm{h}}_{2}\mathrm{M}{\mathrm{o}}_{3}\mathrm{N}$ is a conventional $s$-wave superconductor at ambient pressure. Here we report the evolution of structural and electronic properties of $\mathrm{R}{\mathrm{h}}_{2}\mathrm{M}{\mathrm{o}}_{3}\mathrm{N}$ under high pressure. X-ray diffraction measurements reveal the stability of pristine \ensuremath{\beta}-Mn-type cubic structure up to 47.9 GPa, accompanied by the continuously enhanced distortion of $\mathrm{M}{\mathrm{o}}_{6}\mathrm{N}$ octahedra. Electronic transport experiments show the robustness of superconductivity under pressure, i.e., the superconducting transition temperature ${T}_{\mathrm{c}}$ varies only \ensuremath{\sim}0.7 K upon compression up to 38.5 GPa. Meanwhile, detailed analyses of both structural and transport results consistently reveal a critical pressure of \ensuremath{\sim}14.0 GPa. In agreement with the enhancement of octahedral distortion, the temperature dependence of upper critical magnetic field accords with a $p$-wave model at 22.0 GPa and an $s$-wave model at 6.0 GPa. These results suggest the emergence of novel superconductivity in the distorted $\mathrm{R}{\mathrm{h}}_{2}\mathrm{M}{\mathrm{o}}_{3}\mathrm{N}$ cubic phase under pressure, which could be attributed to the enhanced strength of antisymmetric spin-orbit coupling (ASOC) via pressure-modified local octahedral distortion. Our findings may shed light on the searching and understanding of unique triplet-pairing superconductivity in other inversion-broken superconductors with strong ASOC.

Published
2019
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21. Pressure-tunable large anomalous Hall effect of the ferromagnetic kagome-lattice Weyl semimetal Co3Sn2S2

Author

Ying Zhou, Chunhua Chen, Chuanchuan Gu, Xuliang Chen, Meng-Yao Qi, Yifang Yuan, Haidong Zhou, Jianhui Zhou, Bowen Zhang, Shuyang Wang, Yugui Yao, Yonghui Zhou, Zhaorong Yang, Lili Zhang, Chao An, and Maoyuan Wang

Subjects
Diffraction, Materials science, Condensed matter physics, Weyl semimetal, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Semimetal, Magnetization, Ferromagnetism, Hall effect, Electrical resistivity and conductivity, 0103 physical sciences, Berry connection and curvature, 010306 general physics, 0210 nano-technology
Abstract

We report a systematic high-pressure study of magnetic topological semimetal ${\mathrm{Co}}_{3}{\mathrm{Sn}}_{2}{\mathrm{S}}_{2}$ through measurements of synchrotron x-ray diffraction (XRD), magnetization, electrical, and Hall transports combined with first-principle theoretical calculations. No evident trace of structural phase transition is detected through synchrotron x-ray diffraction over the measured pressure range of 0.2--50.9 GPa. We find that the ferromagnetism and the anomalous Hall resistivity are monotonically suppressed as increasing pressure and almost vanish around 22 GPa. The anomalous Hall conductivity varies nonmonotonically against pressure at low temperatures, involving competition between original and emergent Weyl nodes. Combined with first-principle calculations, we reveal that the intrinsic mechanism due to the Berry curvature dominates the anomalous Hall effect under high pressure.

Published
2019
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22. Observation of New Resonances in the Λb0π+π− System

Author

Angelo Carbone, Jaap Velthuis, Mick Mulder, V. Volkov, Hannah Louise Pullen, F. Blanc, G. Valenti, Z. C. Huard, R. Lefèvre, Sulin Zhang, Florian Reiss, S. Malde, J. He, Surapat Ek-In, S. Easo, Miroslaw Firlej, E. Ben-Haim, Maxime Schubiger, Kevin Maguire, Kuzma Ivshin, A. Petrolini, Marco Petruzzo, Philipp Ibis, Lauren Emma Yeomans, P. Campana, Hongxi Xing, Mark Wilkinson, Roland Waldi, G. Graziani, Ignacio Bediaga, Desmond Mzamo Shangase, Matthew Kelsey, Matthew Kenzie, Marian Stahl, David Gascon, J. Wang, Kevin Heijhoff, Lorenzo Capriotti, Tommaso Colombo, Paolo Carniti, Meril Reboud, Naomi Veronika Raab, Alexander Berezhnoy, Jordy Sebastiaan Butter, Marcin Kucharczyk, Maximilien Chefdeville, J. Lomba Castro, P. Vazquez Regueiro, Tatiana Ovsiannikova, Timofei Maltsev, J. Serrano, Timothy Gershon, Basem Khanji, Y. Xie, Thomas Blake, H. Schindler, Marek Idzik, A. Jawahery, Da Yu Tou, F. Teubert, D. Zhang, Viacheslav Matiunin, D. R. Johnson, Maciej Witold Majewski, C. R. Jones, Thomas Hadavizadeh, D. Hill, Maurizio Martinelli, S. Borghi, S. Esen, Wojciech Kucewicz, Arthur Marius Hennequin, S. Ogilvy, M. van Beuzekom, Scott Ely, Maria Elena Stramaglia, Zan Ren, Matthew Charles, Feng Jiang, Matthieu Marinangeli, Li Xu, Heather Mckenzie Wark, Matthew Scott Rudolph, Cameron Thomas Dean, B. Souza De Paula, Razvan Daniel Moise, Mika Vesterinen, Yonghui Zhou, Marco Cattaneo, Andrea Mogini, S. De Capua, Nikita Kazeev, Yuezhe Yao, Huacheng Cai, S. J. Chen, Jacopo Pinzino, Wen Chao Zhang, C. Sanchez Gras, Sara Elizabeth Mitchell, Marco Santimaria, Naomi Cooke, Flavio Pisani, Mark Slater, J. M. Yu, R. Currie, C. Sanchez Mayordomo, H. V. Cliff, Federico Alessio, Andrew Crocombe, Z. Mathe, Veronika Chobanova, Ia. Bezshyiko, W. Wislicki, Jonas Rademacker, Varvara Batozskaya, Davide Fazzini, Stephane T'Jampens, Christoph Langenbruch, S. Hansmann-Menzemer, M. Shapkin, M. R. J. Williams, Gianluigi Casse, Angelo Loi, Gerd Joachim Kunde, Anna Ossowska, Nathan Jurik, A. Schopper, M. Heß, D. Lucchesi, Nikolay Nikitin, E. Jans, Srishti Bhasin, M. S. Rangel, Liupan An, Oleksander Kot, Stefanie Reichert, l. Soares Lavra, F. F. Wilson, Diego Alejandro Milanes, S. Tolk, Vlad-Mihai Placinta, M. J. Morello, Nikolai Voropaev, P. Perret, Sergey Barsuk, François Fleuret, B. Leverington, L. Giubega, A. Oyanguren, D. Savrina, Jennifer Brigitta Zonneveld, R. Mountain, Sarah Beranek, L. Shekhtman, Qiang Xu, M. T. Tran, Jozef Tomasz Borsuk, R. Santacesaria, Gediminas Sarpis, Jiangqiao Hu, A. Dosil Suárez, Xixin Liang, Stephen M. Stahl, Brij Kishor Jashal, A. Palano, Tomasz Szumlak, Alison Tully, Anna Lupato, T. Lesiak, C. Khurewathanakul, C. Santamarina Rios, N. Neufeld, Miroslav Saur, N. Tuning, Violaine Bellee, William Dean, Titus Mombächer, Thomas Grammatico, A. Gomes, M. Patel, R. Hidalgo Charman, A. Lusiani, Federico Betti, Alex Seuthe, L. A. Granado Cardoso, Mark Hatch, Sebastien Valat, P. E. L. Clarke, Nikita Beliy, R. Vazquez Gomez, S. Monteil, George Holger Lovell, Sebastien Ponce, R. Manera Escalero, I. A. Monroy, Alessandra Gioventù, C. M. Costa Sobral, Sofia Kotriakhova, M. van Veghel, G. Martellotti, Matthieu Kecke, L. Garrido, Loris Martinazzoli, Ao Xu, S. Vecchi, Kayleigh Anne Thomson, M. Rotondo, Renata Kopecna, G. Carboni, Daniele Manuzzi, Mara Senghi Soares, J. García Pardiñas, R. Lindner, Elisabeth Maria Niel, Alex Birnkraut, Anastasiia Kharisova, Federico Lazzari, N. K. Watson, Marie Helene Schune, D. Tonelli, T. J. V. Bowcock, James Vincent Mead, A. C. dos Reis, T. Gys, Johannes Heuel, Manuel Schiller, Sebastian Schulte, Maria Flavia Cicala, D. E. Hutchcroft, R. Jacobsson, Rafal Dominik Krawczyk, Lauren Douglas, Victor Coco, Zhuoming Li, Alessio Piucci, Yasmine Amhis, Albert Comerma-Montells, Elie Aslanides, Thibaud Humair, W. D. Hulsbergen, Konstantinos Petridis, J. A. Rodriguez Lopez, Alexandru Ene, E. Thomas, Florian Lemaitre, Y. N. Gao, Marcel Materok, Julien Cogan, Lennaert Bel, Gabriela Johanna Pomery, G. Alkhazov, U. Egede, Michael McCann, Pavol Stefko, P. Di Nezza, W. Huang, S. Klaver, J. J. Saborido Silva, Nikolay Bondar, Wojciech Krupa, Mikhail Hushchyn, M. Ramos Pernas, Mark Richard James Williams, Mikhail Zavertyaev, Nicola Skidmore, G. Manca, O. Schneider, Natalia Polukhina, Alexander Vagner, Xuhao Yuan, Jiayin Sun, Matteo Bartolini, J. H. Lopes, Zhipeng Tang, Wenhua Hu, Y. Zhang, Malgorzata Pikies, S. Blusk, Anna Danilina, Saverio Mariani, Vukan Jevtic, O. V. Mineev, M. Morandin, Samuel Belin, U. Uwer, M. Mukherjee, Cedric Meaux, Arseniy Vitkovskiy, A. Brossa Gonzalo, P. Gironella Gironell, Patrick Owen, Adam Dendek, B. Garcia Plana, D. Martinez Santos, L. Kravchuk, Simon Stemmle, O. De Aguiar Francisco, B. Sanmartin Sedes, E. van Herwijnen, Sune Jakobsen, R. Matev, Sophie Katharina Kretzschmar, M. Calvo Gomez, A. A. Alves, B. Rachwal, Victor Egorychev, M. Vernet, M. Xu, M. Ravonel Salzgeber, Ph. Ghez, Axel Kevin Kuonen, R. Ekelhof, Vladimir Gligorov, P. Gandini, Alessandro Cardini, J. M. De Miranda, Luca Pescatore, D. Campora Perez, Maciej Wojciech Dudek, G. Corti, Adam Davis, Marcin Chrzaszcz, V. Kudryavtsev, D. R. Ward, Karol Hennessy, Martin Stefan Bieker, Alessandro Camboni, K. M. Fischer, Fedor Baryshnikov, S. Playfer, Frank Ferrari, Daniel Charles Craik, Donal Murray, Dominik Stefan Mitzel, Gianfranco Morello, Preema Rennee Pais, Pawel Kopciewicz, James Mwangi Kariuki, A. Sciubba, J. D. Osborn, Tengiz Kvaratskheliya, J. Z. Fan, Mark Whitehead, Lucas Mcconnell, Semen Eidelman, T. E. Latham, A. Romero Vidal, Constantin Weisser, Vladimir Shevchenko, Olivier Göran Girard, L. G. Scantlebury Smead, Igor Skiba, Sean Benson, R. McNulty, P. Krokovny, Claudio Gotti, U. Straumann, Eduardo Rodrigues, Dominik Müller, Chung Nguyen-Mau, J. M. Otalora Goicochea, Piera Muzzetto, Wolfgang Funk, B. R. Gruberg Cazon, J. Marks, Antje Mödden, H.-P. Dembinski, R. Dzhelyadin, A. Lai, Wander Baldini, Victor Renaudin, P. Alvarez Cartelle, E. Tournefier, Stanislav Poslavskii, David Gerick, J. Ruiz Vidal, L. Tomassetti, Adam Szabelski, A. Ukleja, Sandra Amato, C. Lazzeroni, Gregory Ciezarek, Samuel Coquereau, Matthew George Chapman, G. Wilkinson, Emilie Maurice, S. Gallorini, L. Ferreira Lopes, A. Casais Vidal, M. Straticiuc, S. Stracka, B. Quintana, Barbara Sciascia, G. A. Cowan, Michal Dziewiecki, Emilie Bertholet, Margarita Stepanova, H. Li, Xiao-yan Li, G. Cavallero, C. Vázquez Sierra, V. Vagnoni, E. Luppi, F. J. P. Soler, S. C. Haines, A. Hicheur, Martino Borsato, Andrea Mauri, Wenbin Qian, R. Schwemmer, R. Silva Coutinho, Ryan Newcombe, M. De Serio, D. Lacarrere, C. L. Da Silva, Evgenii Shmanin, Olivier Deschamps, Niklas Stefan Nolte, Alexander Baranov, Jeremy Dalseno, K. Belous, Antonio Pellegrino, Hangyi Wu, Kurt Rinnert, Lukas Gruber, Jolanta Brodzicka, S. Karodia, Biljana Mitreska, Chenxi Gu, P. Griffith, F. Redi, Paolo Ciambrone, E. Santovetti, R. Le Gac, Xiao-Rui Lyu, Jordan Daniel Roth, Dmitrii Pereima, Hossein Afsharnia, V. Franco Lima, Marco Adinolfi, E. Polycarpo, Tatsuya Nakada, Konrad Klimaszewski, Anatoly Konoplyannikov, K. Carvalho Akiba, Lars Eklund, K. Wyllie, Lucia Grillo, B. Pietrzyk, Zhiyu Xiang, C. Matteuzzi, A. McNab, Laurent Dufour, Vanessa Müller, I. Longstaff, Roland Bernet, Milosz Zdybal, G. Bencivenni, John Matthew Durham, S. Filippov, F. Martinez Vidal, X. Cid Vidal, F. Muheim, Ziad Ajaltouni, Fedor Ratnikov, Matthew James Tilley, Nathanael Farley, J. van Tilburg, Carmen Giugliano, Nicola Neri, Andrea Bizzeti, V. Vorobyev, M. Witek, M. Romero Lamas, M. Ferro-Luzzi, Aravindhan Venkateswaran, Tobias Tekampe, Jia-Jia Qin, Carmelo D'Ambrosio, Jean François Marchand, M. Needham, Guillaume Pietrzyk, Igor Kostiuk, A. Fernandez Prieto, Michele Atzeni, A. Trisovic, M. Karacson, John Gordon Smeaton, M. Veltri, G. Haefeli, Alexander Inyakin, Qundong Han, Emmy Gabriel, M. Merk, Y. H. Zheng, Michele Piero Blago, Daniel Vieira, Ming Zeng, Tommaso Pajero, R. Cenci, L. L. Pappalardo, J. Jalocha, Benedetto Gianluca Siddi, Tjeerd Ketel, Dawid Gerstel, Eluned Smith, G. Liu, Andreas Güth, Jascha Peter Grabowski, J. Maratas, Moran Wang, Ifan Williams, Margarete Schellenberg, Peter Svihra, X. Han, Salvatore Aiola, Philip Ilten, Yu. Guz, Jonathan Plews, Oleg Stenyakin, C. Fitzpatrick, C. A. Aidala, L. Del Buono, T. D. Nguyen, Andrea Merli, Jacopo Cerasoli, Sergey Didenko, C. J. G. Onderwater, Alexander Inglessi, Simone Bifani, Sophie Richards, Malte Hecker, Johannes Albrecht, Andrii Usachov, Marco Pappagallo, Malcolm John, Dmitrii Maisuzenko, Hans Dijkstra, Konstantin Gizdov, Wiktor Byczynski, Maxim Borisyak, Yuyue Gan, P. Durante, A. Alfonso Albero, G. Wormser, P. De Simone, Elena Graverini, Roberta Cardinale, Guido Andreassi, C. Gaspar, Sebastian Neubert, Louis Henry, Hilbrand Steffen Kuindersma, Valery Pugatch, J. Fu, Martha Hilton, F. Archilli, Yiheng Luo, B. Malecki, Andrea Valassi, Agnieszka Oblakowska-Mucha, M. Gandelman, N. Sagidova, Svende Braun, B. Spaan, V. Belavin, Murdo Traill, Tomasz Fiutowski, Almagul Kondybayeva, D. Hynds, D. Galli, Alex Pearce, Paul Seyfert, P. Collins, Y. Sun, Slavomira Stefkova, Marina Artuso, E. Gushchin, Pietro Albicocco, P. Billoir, Emanuele Michielin, Deepanwita Dutta, Tara Nanut, J. Garra Tico, Vladimir Romanovskiy, C. Chen, A. Zhelezov, Stephan Escher, J. Closier, A. Massafferri, Emma Buchanan, Daniele Marangotto, Patrick Koppenburg, G. Tellarini, Markus Frank, Mohamad Kozeiha, Andreas Weiden, R. Nandakumar, Karlis Dreimanis, R. Calabrese, M. De Cian, Hongjie Mu, Jakub Moron, Kodassery Prasanth, Vladimir Macko, I. Nasteva, Vladislav Balagura, Zehua Xu, A. Leflat, G. Punzi, Gennady Panshin, Xavier Vilasis-Cardona, M. Poli Lener, M. Winn, M. Pepe Altarelli, Thomas Harrison, Edward James Millard, Marco Gersabeck, I. V. Gorelov, K. Müller, Giovanni Bassi, M. Rama, F. Fontanelli, Michele Veronesi, Roel Aaij, Vadym Denysenko, Renato Quagliani, C. Göbel, S. Kandybei, J. A. B. Coelho, P. Spradlin, T. Kirn, P. R. Li, A. Dziurda, R. Graciani Diaz, Claire Prouve, Vincenzo Battista, S. Perazzini, M. Franco Sevilla, Alexey A. Petrov, Alexey Boldyrev, Nis Meinert, Michal Kreps, Sergey Strokov, C. Marin Benito, Dmitry Popov, Simon Akar, Stefano Petrucci, Kenenbek Arzymatov, B. D. C. Westhenry, Sandro Cadeddu, Alexander Semennikov, Fabrice Desse, L. Zhang, Christoph Hasse, Christopher Burr, D. Vom Bruch, Neville Harnew, Maciej Pawel Szymanski, David Loh, A. Dovbnya, Joseph David Shupperd, J. J. Walsh, Davide Lancierini, B. Jost, S. Farry, A. Bay, Hanna Malygina, Daniel Patrick O'Hanlon, G. Tuci, B. T. Meadows, J. Arnau Romeu, D. Melnychuk, X. J. Zhou, Kevin Heinicke, Kara Renee Mattioli, M. Cruz Torres, E. Grauges, M. Dorigo, G. Raven, D. Decamp, A. Golutvin, Alexander Bondar, M. D. Sokoloff, H. W. Van Hecke, Marco Clemencic, Luyan Sun, Thomas Ackernley, M. Tobin, S.-G. Chitic, Adam Benjamin Morris, Georgios Chatzikonstantinidis, Samuel Maddrell-Mander, S. Ferreres Sole, A. G. Morris, Mikkel Bjørn, F. A. Garcia Rosales, O. Steinkamp, V. Gibson, S. Meloni, E. Dall'Occo, Krzysztof Swientek, Silvia Gambetta, L. De Paula, Baasansuren Batsukh, Franco Bedeschi, A. Vollhardt, A. Bursche, Christopher Parkes, G. D. Lafferty, S. Ricciardi, Felix Johannes Kress, Federica Lionetto, Shantam Taneja, Moritz Demmer, Kristian Alexander Zarebski, Michael Alexander, P. Fernandez Declara, K. De Bruyn, S. Sellam, Thomas Henry Hancock, E. Spadaro Norella, Christoph Frei, Federico Cindolo, Roger Forty, Timon Schmelzer, T. Ruf, Y. Li, Alexander Battig, Roman Greim, S. Roiser, F. Stagni, Giulio Dujany, Phoebe Meredith Hamilton, Jan Buytaert, G. Lanfranchi, M.-N. Minard, A. Vorobyev, F. Dordei, M. Plo Casasus, Ryan Calladine, Plamen Hristov Hopchev, Floris Keizer, L. R. Madhan Mohan, E. Cogneras, Giovanni Passaleva, S. A. Wotton, John Jake Lane, Rudolf Oldeman, Oliver Lupton, A. Gallas Torreira, Simon Nieswand, Annarita Buonaura, Valery Zhukov, S. Simone, Christopher Betancourt, A. Satta, J. A. de Vries, C. Satriano, A. Contu, Olivier Leroy, B. Schmidt, Ivan Belyaev, A. Artamonov, M. Boubdir, D. Wiedner, Iwan Thomas Smith, A. Dzyuba, Guillermo Loustau, A. Di Canto, Tara Shears, L. Silva de Oliveira, Anton Poluektov, Lorenzo Sestini, Anita Nandi, E. Govorkova, Harald Viemann, Blaise Delaney, Laura Promberger, Alessio Sarti, M. Fiorini, P. d'Argent, C. Bozzi, Daniel Berninghoff, A. Heister, A. Puig Navarro, Luca Minzoni, Dylan Jaide White, Y. Wang, C. Haen, Holger Stevens, Hang Yin, Giulio Gazzoni, O. Boente Garcia, Artem Maevskiy, C. B. Van Hulse, Achille Stocchi, Alexander D. Popov, V. Chekalina, Oleg Yushchenko, O. Maev, R. J. Barlow, Abhijit Mathad, Marta Calvi, Tomasz Skwarnicki, Sebastian Bachmann, P. Santangelo, V. Obraztsov, J. V. Viana Barbosa, M. Lucio Martinez, Stephan Eisenhardt, Ivan Polyakov, F. Maciuc, Zishuo Yang, M. Palutan, M. O. Bettler, Gianni Penso, Dana Bobulska, P. Naik, Mauricio Féo, M. Vieites Diaz, Lucio Anderlini, Pietro Marino, M. Schmelling, Xiaofeng Zhu, C. Remon Alepuz, A. Papanestis, A. Grecu, Andrey Ustyuzhanin, J. J. Back, Bernardo Adeva, Dong Xiao, Ph. Charpentier, Alexander Malinin, Janine Müller, Thomas N. Williams, Francesco Dettori, A. B. Rodrigues, A. Falabella, Biagio Saitta, Serhii Koliiev, Alexandra Paige Rollings, John Leslie Cobbledick, G. Simi, Lucian Cojocariu, Mark Smith, A. Bertolin, Aleksei Chernov, Biplab Dey, Serena Maccolini, K. E. Kim, William Parker, F. Polci, Vitalii Lisovskyi, David Anthony Friday, Jakub Ryzka, Robert Hart, Timothy Evans, Davide Brundu, Colm Harold Murphy, Arnaud Robert, Stefano Cali, George Coombs, C. Patrignani, Markus Roehrken, V. Tisserand, M. Andreotti, Alexsei Chubykin, Marianna Fontana, Patrick Robbe, M. Brodski, Phillip John Marshall, Wojciech Krzemien, Evelina Gersabeck, Benjamin Audurier, Denis Derkach, F. Ferreira Rodrigues, H. F. Schreiner, Nicola Serra, Andrew Beiter, U. Marconi, Balazs Voneki, G. Mancinelli, Antonino Sergi, T. Boettcher, Alessandro Pastore, Zhenzi Wang, Veronica Soelund Kirsebom, A. Brea Rodriguez, D. Websdale, L. M. Garcia Martin, B. Couturier, R. A. Fini, C. Abellán Beteta, S. Schael, A. Tsaregorodtsev, Xia-Ji Liu, Frederic Machefert, Sheldon Stone, C. Hadjivasiliou, Ross John Hunter, Michael Becker, Dmitry Golubkov, Stefano Zucchelli, V. Bocci, Patrick Mackowiak, D. Pinci, Jihyun Bhom, Mariia Poliakova, Simon Baker, William Barter, and Martina Pili

Subjects
Baryon, Nuclear physics, Physics, Superposition principle, Excited state, 0103 physical sciences, Degenerate energy levels, Spectrum (functional analysis), General Physics and Astronomy, 010306 general physics, 01 natural sciences, Luminosity, Interpretation (model theory)
Abstract

We report the observation of a new structure in the Λb0π+π- spectrum using the full LHCb data set of pp collisions, corresponding to an integrated luminosity of 9 fb-1, collected at s=7, 8, and 13 TeV. A study of the structure suggests its interpretation as a superposition of two almost degenerate narrow states. The masses and widths of these states are measured to be mΛb(6146)0=6146.17±0.33±0.22±0.16 MeV,mΛb(6152)0=6152.51±0.26±0.22±0.16 MeV,ΓΛb(6146)0=2.9±1.3±0.3 MeV,ΓΛb(6152)0=2.1±0.8±0.3 MeV,with a mass splitting of Δm=6.34±0.32±0.02 MeV, where the first uncertainty is statistical, the second systematic. The third uncertainty for the mass measurements derives from the knowledge of the mass of the Λb0 baryon. The measured masses and widths of these new excited states suggest their possible interpretation as a doublet of Λb(1D)0 states.

Published
2019
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23. Pressure-induced evolution of structural and electronic properties in TiTe2

Author

Bowen Zhang, Chuanchuan Gu, Yonghui Zhou, Xiaoping Yang, Zhaorong Yang, Chao An, Lili Zhang, Chunhua Chen, Ying Zhou, Xiangde Zhu, Xuliang Chen, Hao Wu, Yifang Yuan, and Ranran Zhang

Subjects
Diffraction, Physics, Superconductivity, Anderson localization, Condensed matter physics, Hall effect, High pressure, Electron, Monoclinic crystal system, Electronic properties
Abstract

Bulk $1T\text{\ensuremath{-}}\mathrm{TiT}{\mathrm{e}}_{2}$ (hexagonal, space group P-$3m1$) exhibits semimetallic conductivity with weak Anderson localization characteristic at ambient pressure, but superconductivity under high pressure of $\ensuremath{\sim}5\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$. Here the detailed evolutions of structural and transport properties in $\mathrm{TiT}{\mathrm{e}}_{2}$ during compression are investigated by extending pressure up to 50.2 GPa. The combined high-pressure electrical transport and synchrotron x-ray diffraction experiments unravel two critical pressure points. At ${P}_{c1}\ensuremath{\sim}5.4\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, the superconductivity emerges, which is accompanied by a structural transition from $P\text{\ensuremath{-}}3m1$ to a mixture of $P\text{\ensuremath{-}}3m1$ and monoclinic $C2/m$ phase. The localization effect maintains until the structural transition is over at ${P}_{c2}\ensuremath{\sim}19.1\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, meanwhile the Hall coefficient ${R}_{\mathrm{H}}$ changes from positive to negative. Our results demonstrate that the superconductivity in the pressurized $\mathrm{TiT}{\mathrm{e}}_{2}$ can be assigned to the high-pressure $C2/m$ phase which is electron dominated.

Published
2019
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24. Pressure-induced irreversible evolution of superconductivity in PdBi2

Author

Chao An, Jiyong Yang, Ying Zhou, Xuliang Chen, Yonghui Zhou, Zhaorong Yang, Mingliang Tian, Chunhua Chen, Zhitao Zhang, Langsheng Ling, and Lili Zhang

Subjects
Physics, Crystal, Superconductivity, Crystallography, Condensed Matter::Superconductivity, 0103 physical sciences, 02 engineering and technology, Pressure dependence, 021001 nanoscience & nanotechnology, 010306 general physics, 0210 nano-technology, 01 natural sciences, Maximum pressure
Abstract

Both $\ensuremath{\alpha}\text{\ensuremath{-}}\mathrm{PdB}{\mathrm{i}}_{2}$ and $\ensuremath{\beta}\text{\ensuremath{-}}\mathrm{PdB}{\mathrm{i}}_{2}$ are superconductors with topological nontrivial signs. Here we report that the $\ensuremath{\alpha}\text{\ensuremath{-}}\mathrm{PdB}{\mathrm{i}}_{2}$ superconductor is converted by pressure into the \ensuremath{\beta}-phase superconducting polymorph, with the superconductivity being further enhanced upon decompression. Through high-pressure resistance and synchrotron x-ray-diffraction experiments, we show that the \ensuremath{\alpha} phase transforms into the \ensuremath{\beta} phase at ${P}_{c}\ensuremath{\sim}8$ GPa, above which the superconductivity is robust up to the maximum pressure investigated in this work. More interestingly, when the applied pressure is gradually released from 42.9 down to 1.7 GPa, the ${T}_{c}$ increases monotonously from 2.5 to 4.0 K. We argue that the observed unusual evolution of superconductivity can be explained by combination of pressure-manipulated crystal quality and the pressure dependence of ${T}_{c}$ of the $\ensuremath{\beta}\text{\ensuremath{-}}\mathrm{PdB}{\mathrm{i}}_{2}$ superconductor.

Published
2019
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25. Pressure-induced topological insulator-to-metal transition and superconductivity in Sn-doped Bi1.1Sb0.9Te2S

Author

Zhaorong Yang, Fengqi Song, Ranran Zhang, Chao An, Bin Wu, Yonghui Zhou, Xuliang Chen, Ying Zhou, and Changyong Park

Subjects
Physics, Superconductivity, Diffraction, Valence (chemistry), Condensed matter physics, Band gap, Doping, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, symbols.namesake, Topological insulator, 0103 physical sciences, symbols, 010306 general physics, 0210 nano-technology, Raman scattering, Monoclinic crystal system
Abstract

Tetradymite-type topological insulator Sn-doped $\mathrm{B}{\mathrm{i}}_{1.1}\mathrm{S}{\mathrm{b}}_{0.9}\mathrm{T}{\mathrm{e}}_{2}\mathrm{S}$ (Sn-BSTS), with a surface state Dirac point energy well isolated from the bulk valence and conduction bands, is an ideal platform for studying the topological transport phenomena. Here, we present high-pressure transport studies on single-crystal Sn-BSTS, combined with Raman scattering and synchrotron x-ray diffraction measurements. Over the studied pressure range of 0.7--37.2 GPa, three critical pressure points can be observed: (i) At $\ensuremath{\sim}9$ GPa, a pressure-induced topological insulator-to-metal transition is revealed due to closure of the bulk band gap, which is accompanied by changes in slope of the Raman frequencies and a minimum in $c$/$a$ within the pristine rhombohedral structure ($R\text{\ensuremath{-}}3m$); (ii) at $\ensuremath{\sim}13$ GPa, superconductivity is observed to emerge, along with the $R\text{\ensuremath{-}}3m$ to a $C2$/$c$ (monoclinic) structural transition; (iii) at $\ensuremath{\sim}24$ GPa, the superconducting transition onset temperature ${T}_{\mathrm{C}}$ reaches a maximum of $\ensuremath{\sim}12\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, accompanied by a second structural transition from the $C2$/$c$ to a body-centered cubic $Im\text{\ensuremath{-}}3m$ phase.

Published
2018
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26. Pressure-induced multiband superconductivity in pyrite PtBi2 with perfect electron-hole compensation

Author

Tong Chen, Xuliang Chen, Ying Zhou, Chao An, Dexi Shao, Mingliang Tian, Jian Sun, Chuanchuan Gu, Zhaorong Yang, Yonghui Zhou, and Xiangde Zhu

Subjects
Superconductivity, Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, 02 engineering and technology, Electron hole, engineering.material, 021001 nanoscience & nanotechnology, 01 natural sciences, Compensation (engineering), 0103 physical sciences, engineering, General Materials Science, Pyrite, 010306 general physics, 0210 nano-technology
Published
2018
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27. Superconductivity in Pristine 2Ha−MoS2 at Ultrahigh Pressure

Author

Zhaorong Yang, Xuliang Chen, Xiao-Di Liu, Shengqi Chu, Yijin Zhang, Yanming Ma, Fei Yen, Yonghui Zhou, Jinlong Zhu, Yanchun Li, Zhenhua Chi, Chuanlong Lin, Jinggeng Zhao, Feng Peng, and Tomoko Kagayama

Subjects
Superconductivity, Diffraction, Range (particle radiation), Materials science, Condensed matter physics, Intercalation (chemistry), General Physics and Astronomy, 02 engineering and technology, Electronic structure, 021001 nanoscience & nanotechnology, 01 natural sciences, Synchrotron, law.invention, Pressure range, law, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Fermi Gamma-ray Space Telescope
Abstract

As a follow-up of our previous work on pressure-induced metallization of the 2H_{c}-MoS_{2} [Chi et al., Phys. Rev. Lett. 113, 036802 (2014)PRLTAO0031-900710.1103/PhysRevLett.113.036802], here we extend pressure beyond the megabar range to seek after superconductivity via electrical transport measurements. We found that superconductivity emerges in the 2H_{a}-MoS_{2} with an onset critical temperature T_{c} of ca. 3 K at ca. 90 GPa. Upon further increasing the pressure, T_{c} is rapidly enhanced beyond 10 K and stabilized at ca. 12 K over a wide pressure range up to 220 GPa. Synchrotron x-ray diffraction measurements evidenced no further structural phase transition, decomposition, and amorphization up to 155 GPa, implying an intrinsic superconductivity in the 2H_{a}-MoS_{2}. DFT calculations suggest that the emergence of pressure-induced superconductivity is intimately linked to the emergence of a new flat Fermi pocket in the electronic structure. Our finding represents an alternative strategy for achieving superconductivity in 2H-MoS_{2} in addition to chemical intercalation and electrostatic gating.

Published
2018
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28. Field-induced metamagnetic transition and nonsaturating magnetoresistance in the antiferromagnetic semimetal NdSb

Author

Chao An, Bowen Zhang, Xuliang Chen, Ying Zhou, Zhaorong Yang, Zhengcai Xia, Yonghui Zhou, Sha Huang, Xiangde Zhu, Yifang Yuan, and Chuanchuan Gu

Subjects
Materials science, Magnetoresistance, Condensed matter physics, Atomic force microscopy, Giant magnetoresistance, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Semimetal, Magnetization, Ferromagnetism, 0103 physical sciences, Antiferromagnetism, 010306 general physics, 0210 nano-technology, Saturation (magnetic)
Abstract

We have performed a joint study of magnetization and magnetoresistance in the antiferromagnetic (AFM) semimetal NdSb under pulsed high magnetic field up to 60 T. We show that NdSb displays extremely large magnetoresistance (XMR), reaching values of $1.77\ifmmode\times\else\texttimes\fi{}{10}^{6}%$ at 1.3 K and 60 T without any sign of saturation. The field-dependent magnetization at 4.2 K reveals a field-induced metamagnetic transition from the AFM to the ferromagnetic state around 9 T. During the metamagnetic transition, a steplike reduction of resistance occurs, resembling the giant magnetoresistance (GMR) behavior in metallic multilayers. The investigation of the Shubnikov--de Haas effect in NdSb suggests that a particular orbital texture might contribute to the XMR effect in addition to the perfect electron-hole compensation.

Published
2017
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29. Pressure-induced anomalous enhancement of insulating state and isosymmetric structural transition in quasi-one-dimensional TiS3

Author

Xuliang Chen, Zhaorong Yang, Changyong Park, Juefei Wu, Bowen Zhang, Jian Sun, Chuanchuan Gu, Ying Zhou, Chao An, Yonghui Zhou, Pengchao Lu, and Yifang Yuan

Subjects
Diffraction, Structural phase, Materials science, Condensed matter physics, Structural symmetry, 02 engineering and technology, State (functional analysis), 021001 nanoscience & nanotechnology, 01 natural sciences, Condensed Matter::Materials Science, Electrical transport, 0103 physical sciences, Structural transition, Quasi one dimensional, 010306 general physics, 0210 nano-technology
Abstract

We present in situ high-pressure synchrotron x-ray diffraction (XRD) and electrical transport measurements on quasi-one-dimensional single-crystal $\mathrm{Ti}{\mathrm{S}}_{3}$ up to 29.9--39.0 GPa in diamond-anvil cells, coupled with first-principles calculations. Counterintuitively, the conductive behavior of semiconductor $\mathrm{Ti}{\mathrm{S}}_{3}$ becomes increasingly insulating with pressure until ${P}_{C1}\ensuremath{\sim}12\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, where extremes in all three axial ratios are observed. Upon further compression to ${P}_{C2}\ensuremath{\sim}22\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, the XRD data evidence a structural phase transition. Based on our theoretical calculations, this structural transition is determined to be isosymmetric, i.e., without change of the structural symmetry ($P{2}_{1}/m$), mainly resulting from rearrangement of the dangling ${\mathrm{S}}_{2}$ pair along the $a$ axis.

Published
2017
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30. Pressure-Induced New Topological Weyl Semimetal Phase in TaAs

Author

Yuheng Zhang, Xiangde Zhu, Zhaorong Yang, Jian Sun, Ganghua Zhang, Pengchao Lu, Xuliang Chen, Dexi Shao, Yonghui Zhou, Ranran Zhang, Mingliang Tian, Xiangang Wan, Xuefei Wang, D. Y. Xing, Wenge Yang, and Yongping Du

Subjects
Physics, Surface (mathematics), Superconductivity, Condensed matter physics, General Physics and Astronomy, Weyl semimetal, 02 engineering and technology, State (functional analysis), Fermion, 021001 nanoscience & nanotechnology, 01 natural sciences, Quantum mechanics, Phase (matter), 0103 physical sciences, 010306 general physics, 0210 nano-technology, Energy (signal processing), Surface states
Abstract

We report a new pressure-induced phase in TaAs with different Weyl fermions than the ambient structure with the aid of theoretical calculations, experimental transport and synchrotron structure investigations up to 53 GPa. We show that TaAs transforms from an ambient $I{4}_{1}md$ phase ($t\text{\ensuremath{-}}\mathrm{TaAs}$) to a high-pressure hexagonal $P\text{\ensuremath{-}}6m2\text{ }$ ($h\text{\ensuremath{-}}\mathrm{TaAs}$) phase at 14 GPa, along with changes of the electronic state from containing 24 Weyl nodes distributed at two energy levels to possessing 12 Weyl nodes at an isoenergy level, which substantially reduces the interference between the surface and bulk states. The new pressure-induced phase can be reserved upon releasing pressure to ambient condition, which allows one to study the exotic behavior of a single set of Weyl fermions, such as the interplay between surface states and other properties.

Published
2016
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31. Pressure-induced reemergence of superconductivity in topological insulatorSr0.065Bi2Se3

Author

Changyong Park, Chao An, Xuefei Wang, Wei Tong, Changjin Zhang, Yuheng Zhang, YM Zhou, Zhaorong Yang, Ranran Zhang, Xuliang Chen, Yonghui Zhou, Li Pi, and Jifeng Shao

Subjects
Physics, Superconductivity, Diffraction, Condensed matter physics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Base (group theory), Condensed Matter::Materials Science, Tetragonal crystal system, Condensed Matter::Superconductivity, Topological insulator, Phase (matter), 0103 physical sciences, Ideal (ring theory), 010306 general physics, 0210 nano-technology, Monoclinic crystal system
Abstract

The recently discovered ${\mathrm{Sr}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ superconductor provides an alternative and ideal material base for investigating possible topological superconductivity. Here, we report that in ${\mathrm{Sr}}_{0.065}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$, the ambient superconducting phase is gradually depressed upon the application of external pressure. At high pressure, a second superconducting phase emerges at above 6 GPa, with a maximum ${T}_{c}$ value of $\ensuremath{\sim}8.3$ K. The joint investigations of the high-pressure synchrotron x-ray diffraction and electrical transport properties reveal that the reemergence of superconductivity in ${\mathrm{Sr}}_{0.065}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is closely related to the structural phase transition from an ambient rhombohedral phase to a high-pressure monoclinic phase around 6 GPa, and further to another high-pressure tetragonal phase above 25 GPa.

Published
2016
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32. Comment on 'Time-dependent magnetotransport in a driven graphene spin valve'

Author

Yonghui Zhou and M. W. Wu

Subjects
Physics, Formalism (philosophy of mathematics), Condensed matter physics, Graphene, law, Quantum mechanics, Spin valve, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, law.invention
Abstract

We show that the key formula in the works of Ding et al. [K.-H. Ding, Z.-G. Zhu, and J. Berakdar, Phys. Rev. B 79, 045405 (2009); K.-H. Ding, Z.-G. Zhu, and J. Berakdar, Phys. Rev. B 84, 115433 (2011); K.-H. Ding, Z.-G. Zhu, Z.-H. Zhang, and J. Berakdar, Phys. Rev. B 82, 155143 (2010)] is invalid in the extended graphene system they investigated. The correct formalism in the extended infinite system is also presented in this Comment.

Published
2013
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33. Fermi-surface evolution and pseudogap symmetry inn-type cuprate superconductors

Author

Hsin Lin, Yonghui Zhou, and Chang-De Gong

Subjects
Condensed Matter::Quantum Gases, Superconductivity, Physics, Condensed matter physics, Doping, Fermi surface, Electron, Electronic structure, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Condensed Matter::Superconductivity, Condensed Matter::Strongly Correlated Electrons, Strongly correlated material, Cuprate, Pseudogap
Abstract

Based on a doping dependent t-t -t -J Hamiltonian, the pseudogap and the structure of the Fermi surface are studied as a function of electron doping. No extra adjustable parameter is introduced and no gap associated order parameter is preassumed. The evolution from the small electron pocket centered at ,0 to the large holelike Fermi surface centered at , upon increasing the doping level is revealed. A clear flat region near the hot spot is formed, which accounts for the opening of the pseudogap. Both the position and the magnitude of this pseudogap are consistent with the experiments. The influence of the pseudogap on the measured superconducting gap and difference between the electronand hole-doped cuprates are also discussed.

Published
2008
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34. Icosahedrally Related Decagonal Quasicrystal in Rapidly Cooled Al-14-at.%-Fe Alloy

Author

Bao-gen Shen, Chongli Yang, Jize Zhao, Yonghui Zhou, Kenneth Fung, and W. Zhan

Subjects
Quenching, Materials science, business.industry, Alloy, General Physics and Astronomy, Quasicrystal, Crystal structure, engineering.material, law.invention, Crystallography, Optics, medicine.anatomical_structure, Electron diffraction, law, Temple, engineering, medicine, Electron microscope, business
Published
1986
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35. Transmission-electron-microscopy study of high-temperature superconducting phases in the Tl-Ba-Ca-Cu-O system

Author

Shuhong Xie, Yaohui Zhang, Yonghui Zhou, and K. K. Fung

Subjects
Superconductivity, Tetragonal crystal system, Materials science, Condensed matter physics, Electron diffraction, Transmission electron microscopy, Electrical resistivity and conductivity, Transition temperature, Analytical chemistry, Space group, Crystal structure
Abstract

Two phases have been identified by convergent-beam electron diffraction in multiphase compounds of TlBaCaCu/sub 3/O/sub 6.5/ with a superconductivity temperature of 114 K. They are subsequently found to be superconducting at 120.3 and 90.0 K. These phases are tetragonal with point group 4/mmm and lattice parameters of a = 0.547 nm; c = 3.61 nm and a = 0.547 nm, c = 2.97 nm, respectively. We have found by high-resolution lattice imaging that the 3.61 and 2.97 nm phases form coherent intergrowths. Both ordered and disordered intergrowths have been observed.

Published
1988
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