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1. Lattice-shifted nematic quantum critical point in FeSe1−x S x

Author

S. Chibani, D. Farina, P. Massat, M. Cazayous, A. Sacuto, T. Urata, Y. Tanabe, K. Tanigaki, A. E. Böhmer, P. C. Canfield, M. Merz, S. Karlsson, P. Strobel, P. Toulemonde, I. Paul, and Y. Gallais

Subjects
Materials of engineering and construction. Mechanics of materials, TA401-492, Atomic physics. Constitution and properties of matter, QC170-197
Abstract

Abstract We report the evolution of nematic fluctuations in FeSe1−x S x single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) x c ~ 0.17 via Raman scattering. The Raman spectra in the B 1g nematic channel consist of two components, but only the low energy one displays clear fingerprints of critical behavior and is attributed to itinerant carriers. Curie–Weiss analysis of the associated nematic susceptibility indicates a substantial effect of nemato-elastic coupling, which shifts the location of the nematic QCP. We argue that this lattice-induced shift likely explains the absence of any enhancement of the superconducting transition temperature at the QCP. The presence of two components in the nematic fluctuations spectrum is attributed to the dual aspect of electronic degrees of freedom in Hund’s metals, with both itinerant carriers and local moments contributing to the nematic susceptibility.

Published
2021
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2. A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar

Author

R. A. Burns, Y. Uno, N. Sakai, J. Blanchard, Z. Rosli, G. Orosz, Y. Yonekura, Y. Tanabe, K. Sugiyama, T. Hirota, Kee-Tae Kim, A. Aberfelds, A. E. Volvach, A. Bartkiewicz, A. Caratti o Garatti, A. M. Sobolev, B. Stecklum, C. Brogan, C. Phillips, D. A. Ladeyschikov, D. Johnstone, G. Surcis, G. C. MacLeod, H. Linz, J. O. Chibueze, J. Brand, J. Eislöffel, L. Hyland, L. Uscanga, M. Olech, M. Durjasz, O. Bayandina, S. Breen, S. P. Ellingsen, S. P. van den Heever, T. R. Hunter, and X. Chen

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

High-mass protostars (M$_{\star} >$ 8 M$_{\odot}$) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous accretion disks. Limitations of observational capabilities, paired with a lack of observed accretion burst events has withheld affirmative confirmation of the association between disk accretion, instability and the accretion burst phenomenon in high-mass protostars. Following its 2019 accretion burst, a heat-wave driven by a burst of radiation propagated outward from the high-mass protostar G358.93-0.03-MM1. Six VLBI (very long baseline interferometry) observations of the raditively pumped 6.7 GHz methanol maser were conducted during this period, tracing ever increasing disk radii as the heat-wave propagated outward. Concatenating the VLBI maps provided a sparsely sampled, milliarcsecond view of the spatio-kinematics of the accretion disk covering a physical range of $\sim$ 50 - 900 AU. We term this observational approach `heat-wave mapping'. We report the discovery of a Keplerian accretion disk with a spatially resolved four-arm spiral pattern around G358.93-0.03-MM1. This result positively implicates disk accretion and spiral arm instabilities into the episodic accretion high-mass star formation paradigm., Published in Nature Astronomy in 2023

Published
2023
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5. 125MO Long-term outcomes of neoadjuvant trastuzumab emtansine + pertuzumab (T-DM1+P) and docetaxel + carboplatin + trastuzumab + pertuzumab (TCbHP) for HER2-positive primary breast cancer: JBCRG20 study (Neo-peaks)

Author

K. Inoue, N. Masuda, T. Takano, M. Ito, Y. Tanabe, K. Kawaguchi, H. Yasojima, H. Bando, R. Nakamura, T. Yamanaka, K. Ishida, T. Argua, Y. Yanagita, E. Tokunaga, K. Aogi, S. Ohno, H. Kasai, T.R. Kataoka, S. Morita, and M. Toi

Subjects
Cancer Research, Oncology
Published
2023
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8. Metric discrepancy results for geometric progressions perturbed by irrational rotations

Author

Y. Tanabe, S. Mori, and Katusi Fukuyama

Subjects
Sequence, General Mathematics, Modulo, 010102 general mathematics, lacunary sequence, 010103 numerical & computational mathematics, 01 natural sciences, Geometric progression, Irrational rotation, Combinatorics, Irrational number, Metric (mathematics), discrepancy, 0101 mathematics, Algebraic number, Random variable, Mathematics, law of the iterated logarithm
Abstract

For $$\theta \in (-\infty , -1)\cup (1, \infty )$$ and for almost every x, it is known that the sequence $$\{\theta ^k x\}$$ is uniformly distributed modulo 1. The speed of convergence sensitively depends on the algebraic nature of $${\theta}$$. In this paper we prove that such dependence vanishes if we perturb the sequence by adding the irrational rotation $$\{\kappa\gamma\}$$. The speed becomes identical with that of the sequence of uniformly distributed independent random variables.

Published
2020

9. Author Correction: A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar

Author

R. A. Burns, Y. Uno, N. Sakai, J. Blanchard, Z. Rosli, G. Orosz, Y. Yonekura, Y. Tanabe, K. Sugiyama, T. Hirota, Kee-Tae Kim, A. Aberfelds, A. E. Volvach, A. Bartkiewicz, A. Caratti o Garatti, A. M. Sobolev, B. Stecklum, C. Brogan, C. Phillips, D. A. Ladeyschikov, D. Johnstone, G. Surcis, G. C. MacLeod, H. Linz, J. O. Chibueze, J. Brand, J. Eislöffel, L. Hyland, L. Uscanga, M. Olech, M. Durjasz, O. Bayandina, S. Breen, S. P. Ellingsen, S. P. van den Heever, T. R. Hunter, and X. Chen

Subjects
Astronomy and Astrophysics
Published
2023
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10. Óxidos do tipo perovskita para reação de redução de no com CO Perovskite-type oxides to no reduction with CO

Author

Eurico Y. Tanabe and Elisabete M. Assaf

Subjects
perovskite, lanthanum, NO reduction with CO, Chemistry, QD1-999
Abstract

In this work, the perovskite-type oxides LaNiO3, LaMnO3, La0,7Sr0,3NiO3 and La0,7Sr0,3MnO3 were prepared by co-precipitation and tested in the NO reduction with CO at 400 and 500 ºC for 10 h. The catalysts were characterized by X-ray diffraction, temperature programmed reduction with hydrogen, nitrogen adsorption and chemical analysis. The nonstoichiometric oxygen was quantified by temperature programmed reduction, and the catalytic tests showed that the La0,7Sr0,3MnO3 catalyst presented the higher performance for the reduction reaction of NO with CO. The partial substitution of lanthanum by strontium increased the NO conversion and the N2 yield.

Published
2009
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14. One Year Treatment with Benralizumab in Patients with Severe Asthma

Author

T. Watanabe, S. Abe, Hitoshi Sasano, T. Nishimaki, Sonoko Harada, Fumihiko Makino, Tomohito Takeshige, Y. Tanabe, Norihiro Harada, Kazuhisa Takahashi, Ryo Atsuta, Jun Ito, Y. Oyama, Shoko Ueda, Yuuki Sandhu, and Kei Matsuno

Subjects
chemistry.chemical_compound, Pediatrics, medicine.medical_specialty, chemistry, business.industry, Severe asthma, Medicine, In patient, business, Benralizumab
Published
2020
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15. Microwave Absorption by Charge Density Waves in La2–xSrxCuO4

Author

Y. Tanabe, Tadashi Adachi, I. I. Gimazov, Yoji Koike, K. Omori, and Yu. I. Talanov

Subjects
Superconductivity, Diffraction, Materials science, Physics and Astronomy (miscellaneous), Condensed matter physics, Direct current, Charge density, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic susceptibility, Condensed Matter::Superconductivity, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Absorption (electromagnetic radiation), Charge density wave, Microwave
Abstract

The results of studying the La2–xSrxCuO4 (x = 0.077−0.195) crystals with the microwave absorption, direct current resistance and magnetic susceptibility measurements are presented. The doping-temperature phase diagram with the boundaries of the areas with charge density waves, superconducting fluctuation and the bulk superconductivity state is plotted. The doping range of the charge density wave existence is found to be broader than that obtained from the X-Ray Diffraction study. It spreads at least down to x = 0.077.

Published
2018
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16. An efficient contact model for dynamic interaction analysis of high-speed train and railway structure including derailment during an earthquake

Author

Keiichi Goto, T. Watanabe, Masamichi Sogabe, Hajime Wakui, Y. Tanabe, and Makoto Tanabe

Subjects
Structure (mathematical logic), Derailment, business.industry, Computer science, Automotive Engineering, Transportation, Structural engineering, Multibody system, business, Contact model, Finite element method, Civil and Structural Engineering
Published
2017
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17. A simple and efficient numerical model for dynamic interaction of high speed train and railway structure including derailment during an earthquake

Author

Keiichi Goto, Tsutomu Watanabe, Hajime Wakui, Masamichi Sogabe, Makoto Tanabe, and Y. Tanabe

Subjects
Engineering, Derailment, business.industry, Equations of motion, General Medicine, Structural engineering, 010501 environmental sciences, Multibody system, Track (rail transport), 01 natural sciences, Finite element method, Damper, Nonlinear system, 0103 physical sciences, business, Reduction (mathematics), 010301 acoustics, 0105 earth and related environmental sciences
Abstract

A simple and efficient numerical model to solve the dynamic interaction of a high-speed train and railway structure including derailment and post-derailment during an earthquake is given. Mechanical model to express contact-impact behaviours between wheel and rail before derailment and between wheel and track structure after derailment is discussed. A contact model based on multipoint contact springs on the contact surface between wheel and the track structure after derailment is given. An efficient contact element to express contact-impact behaviour between the car body of the train and the railway structure during and after derailment is also given where the contact stiffness is described as a nonlinear function of the contact displacement. The motion of the train with nonlinear springs and dampers is modelled in multibody dynamics. The railway structure is modelled with various finite elements. The modal reduction is applied to equations of motion of the train and railway structure. A robust time integration using the exact time integration has been developed in the modal coordinate to solve the radical dynamic interaction including derailment during an earthquake to avoid the round-off error which normally appears in the numerical time integration for very small time increments. Numerical example is demonstrated.

Published
2017
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18. Fluctuations of various order parameters in cuprate and fe-based superconductors as revealed by microwave absorption measurements

Author

Takashi Noji, Y. Tanabe, Yu. I. Talanov, K. Omori, Tadashi Adachi, Dmitriy A. Chareev, I. I. Gimazov, Yoji Koike, and Alexander N. Vasiliev

Subjects
Superconductivity, Nuclear and High Energy Physics, Materials science, High-temperature superconductivity, Condensed matter physics, NON-RESONANT MICROWAVE ABSORPTION, HIGH TEMPERATURE SUPERCONDUCTORS, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Order (biology), SUPERCONDUCTING ORDER PARAMETER FLUCTUATIONS, law, Cuprate, Fe based, Absorption (electromagnetic radiation), Spectroscopy, Microwave
Abstract

Fluctuations of various order parameters are considered as the significant components of understanding the mechanism of high-Tc superconductivity. To study these fluctuations in the cuprate and Fe-based superconductors we use the joint measurements of direct current resistivity and non-resonant microwave absorption. Comparing data obtained with both methods allowed us to extract the contribution of dynamic charge density waves in La2−xSrxCuO4, superconducting fluctuations in Bi2Sr2Ca1−xYxCu2O8 and nematic fluctuations in FeTe1−xSex. © Kazan Federal University (KFU). Government Council on Grants, Russian Federation Government Council on Grants, Russian Federation Russian Academy of Sciences, RAS Kazan Federal University This work was supported by the Russian Academy of Sciences via the grant of Program 1.12 “Fundamental Problems of High-Temperature Superconductivity”. The work of D.Ch. is supported by the program 211 of the Russian Federation Government, agreement No. 02.A03.21.0006 and by the Russian Government Program of Competitive Growth of Kazan Federal University. The work of A.V. has been supported by Act 211 of the Government of Russian Federation, Contracts No. 02.A03.21.0006 and No. 02.A03.21.0011.

Published
2019

19. Mobility spectrum analytical approach for intrinsic band picture of Ba(FeAs)2

Author

K K Huynh, Y Tanabe, T Urata, S Heguri, K Tanigaki, T Kida, and M Hagiwara

Subjects
iron pnictide superconductors, Fermi surface, magnetotransport, 71.18.+y, 72.15.Gd, 74.70.Xa, Science, Physics, QC1-999
Abstract

Unconventional high temperature superconductivity as well as three-dimensional bulk Dirac cone quantum states arising from the unique d-orbital topology have comprised an intriguing research area in physics. Here we apply a special analytical approach using a mobility spectrum, in which the carrier number is conveniently described as a function of mobility without any hypothesis, both on the types and the numbers of carriers, for the interpretations of longitudinal and transverse electric transport of high quality single crystal Ba(FeAs) _2 in a wide range of magnetic fields. We show that the majority carriers are accommodated in large parabolic hole and electron pockets with very different topology as well as remarkably different mobility spectra, whereas the minority carriers reside in Dirac quantum states with the largest mobility as high as 70,000 cm ^2 (Vs) $^{-1}$ . The deduced mobility spectra are discussed and compared to the reported sophisticated first principle band calculations.

Published
2014
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20. List of contributors

Author

S. Akyol, A.Y. Arbenin, J.D. Avila, M. Bäker, A. Bandyopadhyay, K. Bartha, C. Battocchio, H.S. Baumgarten, A. Bendavid, B. Ben-Nissan, S. Bose, F. Brunke, A.H. Choi, J. Čížek, C.M. Cotrut, M. Dinu, L. Dluhoš, T. Duerig, T. Ebel, Y. Estrin, S. Franchi, J.L. Fraysse, F.H. (Sam) Froes, S. Gatina, P. Gubbi, T. Hanawa, Y.L. Hao, Y. Hao, P. Harcuba, W.T. Hou, G. Iucci, E. Ivanova, M. Janeček, L. Jia, C. Kasper, K. Kondoh, A. Kumar, M. Landa, R. Lapovok, M. Leary, S.J. Li, S. Li, N. Liu, T.C. Lowe, A.E. Medvedev, R.D.K. Misra, M. Morinaga, M. Niinomi, F. Ory, E.V. Parfenov, V. Polyakova, D. Preisler, V. Pruna, M. Qian, A. Ramezannejad, I. Sabirov, M. Santi, J.J. Scutti, V. Secchi, I. Semenova, T.B. Sercombe, H. Sibum, C. Siemers, V.M. Smirnov, R. Soba, D.B. Spenciner, J. Stráský, Y. Tanabe, H.P. Tang, R.G. Thompson, I. Titorencu, J. Umeda, R.Z. Valiev, A. Vladescu, T. Wojtisek, D. Wolter, C.S. Xiang, Q.S. Xu, W. Xu, R. Yang, E.G. Zemtsova, L.-C. Zhang, P. Zhao, and S. Zhao

Published
2018
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21. Eosinophilia during treatment of immune checkpoint inhibitors (ICIs) predicts succeeding onset of immune-related adverse events (irAEs)

Author

Kizawa, R., primary, Miura, Y., additional, Oda, Y., additional, Nagaoka, Y., additional, Masuda, J., additional, Ozaki, Y., additional, Kondoh, C., additional, Moriguchi, S., additional, Takahashi, Y., additional, Ogawa, K., additional, Hashimoto, Y Tanabe, additional, Taniguchi, S., additional, Okaneya, T., additional, Kishi, A., additional, Hayashi, N., additional, Takaya, H., additional, and Takano, T., additional

Published
2019
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22. Eosinophilia during treatment of immune checkpoint inhibitors (ICIs) predicts succeeding onset of immune-related adverse events (irAEs)

Author

Naomi Hayashi, Y Tanabe Hashimoto, Kazumasa Ogawa, Yui Takahashi, Jun Masuda, Toshikazu Okaneya, Yuji Miura, Yukinori Ozaki, Y. Nagaoka, S. Moriguchi, Chihiro Kondoh, H. Takaya, R. Kizawa, A. Kishi, Toshimi Takano, Y. Oda, and S. Taniguchi

Subjects
Oncology, medicine.medical_specialty, business.industry, Hazard ratio, Hematology, Gene mutation, Chemotherapy regimen, law.invention, Clinical trial, Randomized controlled trial, law, Internal medicine, medicine, Eosinophilia, Progression-free survival, medicine.symptom, business, Adverse effect
Abstract

Background Patients with sensitive gene mutations could achieve better overall survival by taking targeted drugs. Many trials have shown that non-small cell lung cancer (NSCLC) patients with epidermal growth factor receptor (EFGR) mutation responded to PD-1/PD-L1 inhibitors worse than EGFR wild-type. And subgroups of trials have also reported the efficacy of PD-1/PD-L1 inhibitors in the treatment of NSCLC patients with other sensitive gene mutations. So, we conducted a complementary systematic review and meta-analysis to compare efficacy of PD-1/PD-L1 inhibitors for NSCLC patients with sensitive gene mutations. Methods PubMed, EMBASE, Web of Science and the Cochrane Central Register of Controlled Trials (Central) databases were searched for all clinical trials in NSCLC until 5th of January 2019. Eligible studies included randomized controlled trials (RCTs) comparing PD-1/PD-L1 inhibitors with chemotherapy in NSCLC patients with sensitive gene mutations. The hazard ratio (HR) and 95% confidence intervals (CIs) of overall survival (OS) or progression-free survival (PFS) were used. Results We analyzed 193 patients in this study. Among cumulative total of 210 patients, 197 were treated with PD-1 or PD-L1 inhibitors. Another 8 and 5 patients were treated with CTLA-4 inhibitor alone and combination with PD-1 inhibitor, respectively. This study included non-small cell lung cancer (n = 106; 50.5%), kidney (n = 23; 10.9%), melanoma (n = 30; 14.3%), gastric (n = 19; 9.0%), Hodgkin lymphoma (n = 11; 5.2%), urothelial carcinoma (n = 10; 4.8%) and others (n = 10; 4.8%). Any grade of irAEs occurred in 73 (34.8%) cumulative patients, and among them, 28 (13.3%) were classified as grade 3-5. The most common irAEs in any grade were skin disorders (n = 29) and endocrine disorders including thyroid dysfunction and adrenal insufficiency (n = 28). Eosinophilia occurred in 57 cumulative patients (27.1%), and 21 patients out of them had eosinophilia from baseline. Among the clinical and laboratory factors, only eosinophilia was significantly associated with the occurrence of any grade of irAEs in both univariate (p = 0.010) and multivariate (p = 0.0463) analyses. Notably, endocrine irAEs were significantly related to eosinophilia (p = 0.0287). Conclusions Eosinophilia after the initiation of treatment with ICIs predicts succeeding onset of irAEs. Legal entity responsible for the study The authors. Funding Has not received any funding. Disclosure Y. Miura: Honoraria (self): Ono; Honoraria (self): Bristol-Myers Squibb Japan; Honoraria (self): Chugai. T. Takano: Honoraria (self): Daiichi Sankyo; Honoraria (self): Kyowa Hakko Kirin; Honoraria (self): Eisai; Research grant / Funding (self): MSD; Research grant / Funding (self): Ono; Research grant / Funding (self): Merck Serono; Research grant / Funding (self): Taiho; Research grant / Funding (self): Novartis; Research grant / Funding (self): Chugai. All other authors have declared no conflicts of interest.

Published
2019
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23. Poster session Friday 13 December - PM: 13/12/2013, 14:00-18:00 * Location: Poster area

Author

A. Rojek, M. Bekbossynova, J. Onaindia, R. Ferrer Lopez, B. Javani, A. Sharif-Rasslan, N. Al, R. Davies, U. Ikeda, R. Ferreira, A. Cincin, M. Plewka, F. Weidemann, B. Fadel, O. Akgul, Z. Frikha, M. Haghjoo, J. Jensen, G. Agoston, M. Sunbul, R. Strasser, M. Pepi, Y. Fuku, M. Minamisawa, J. Holm, O. Dzikowska Diduch, Y. Pya, J. Macancela Quinones, P. Gaudron, G. Ertl, S. Thivolet, C. Koukoulis, H. Yun, S. Iancovici, D. Capodanno, M. Barthelet, A. Medeiros-Domingo, T. Le Tourneau, A. P. Lee, G. Derumeaux, I. Rodriguez, B. Naegeli, S. Rahmatullah, A. Bayes, H. Schaff, A. M. Caggegi, C. Zito, M. D'alto, R. Favilli, J. Baan, M. Aydin, J. Bonaque Gonzalez, A. Akhundova, I. Cruz, R. Karpov, H. Okura, D. Dequanter, M. T. Grillo, A. Ingvarsson, S. Prasad, A. Dahiya, U. Rosenschein, G. Sinagra, J. Kochanowski, M. Niemann, Y. Saijo, B. Bouma, K. Sveric, Y. Topilsky, M. Ministeri, J. Piek, C. Marinescu, M. Bilik, I. Ikuta, M. Al-Admawi, C. Araujo, D. Trifunovic, S. Onciul, G. Pavlidis, F. Ruiz Lopez, M. Oyumlu, C. Kenny, F. Kayan, C. Ginghina, R. Piatkowski, I. Lekuona Goya, A. Almeida, G. Portugal, H. Motoki, M. Cinteza, B. Seifert, S. Lee, M. Banovic, T. Sakakura, A. Pappalardo, B. Stuart, Y. Chuyasova, T. Yamanaka, N. Roche, C. Wunderlich, X. Arana, L. Ernande, V. Ribeiro, Y. Tanabe, L. Vazdar, Y. Tayyareci, E. Malev, M. Eren, J. Gil, S. Lunghetti, D. Krieger, S. Mangiafico, M. Izumo, D. Cacela, A. Kovacs, A E Van Den Bosch, E. Reffo, P. G. Jorgensen, O. Dubourg, J. Abreu, S. Wang, E. Cervesato, K. Theodoropoulos, N. Ozaydogdu, L. Jung, Y. Kijima, E. Ostenfeld, C. Corsi, M. Florescu, M. Chenilleau, K. Yokota, A. Faeh-Gunz, R. Winter, J. Dreyfus, D. Kang, S. K. Saha, S. Surdulli, L. Abikeyeva, M. Marchel, P. Meregalli, M. Yamat, X. Arana Achaga, C. Shahla, V. Palicka, M. Tanaka, A. Galrinho, K. Endo, M. Saravi, J. Bogaert, H. Oeygarden, S. Okabe, J. Reiken, G. Ionescu, C. Selton-Suty, A. Nunes-Diogo, E. S. Davidsen, E. Kinova, A. Bandeira, Y. Seo, S. Hojberg, G. Siblini, M. Pellegrino, M. Ostojic, J. J. Onaindia Gandarias, M. Pereira, F. Antonini-Canterin, F. Akturk, T. Nakajima, M. Al Fayyadh, S. Herrmann, G. Stellin, M. E. Menting, B. Sasko, J. Song, T. Kurokawa, F. Dipasqua, T. Maruo, M. Geleijnse, H. Triantafyllidi, M. Komeda, R. Praus, V. Nesvetov, M. Fineschi, A. Auricchio, M. Dorobantu, A. Degirmencioglu, E. Laraudogoitia Zaldumbide, S. Velasco Del Castillo, Z. Marcetic, U. Waje-Andreassen, F. Fang, K. Farsalinos, L. Vasina, D. Muraru, M. Faludi, P. Rio, S. Peppes, T. Karaahmet, G. Suermeci, P. Maccarthy, S. Kotsovilis, Y. Akashi, G. Di Salvo, Z. Issa, J. Gibbs, A. Poletti, E. Bonnefoy-Cudraz, A. Madej-Pilarczyk, E. Gerdts, K. Solymossy, P. Kogoj, T. Tomita, M. Lisi, K. Suzuki, S. Sifakis, E.A. Surkova, T. Fritz-Hansen, V. Tritakis, E. Romeo, T. Akesson-Lindow, B. Lasota, A. Florian, M. Maciel, K. Gieszczyk-Strozik, M. Imazio, S. Ozyilmaz, K. Kadota, V. Peric, E. Zencirci, B. Tzvetkov, U. Aguirre Larracoechea, D. Caldeira, Y. Motoyoshi, M. Russo, R. Suri, H. Pintaric, O. Celik, D. Himbert, L. Branco, B. Sun, S. Dzhetybayeva, A. Esen Zencirci, M. Ciurzynski, R. Nunyez, B. Iung, K. Takenaka, A. S. Omran, K. Ozden, J. Argacha, S. Pradel, A. M. Pistritto, M. Pfyffer, C. Dedobbeleer, J. Vojacek, P. Costa, E. Albuquerque, A. Tamadoni, B. Sarubbi, M. Carlsson, R. Mogelvang, G. Oria, K. Kimura, E. Kim, F. Kousathana, A. Mateescu, A. Varga, J. Clerc, M. Noni, S. Kyrzopoulos, S. Andossova, S. Almeida, E. Shkolnik, J. Koyama, M. Daimon, S. Saeed, B. Popescu, M. Tigen, R. Wennemann, C. Venner, M. Guazzi, R. Magalhaes, H. Hayashi, M. Salagianni, A. Kiotsekoglou, A. Baggiano, C. Chao, T. Nakao, H. Becher, R. Zeppellini, J. Marrugat, G. Erente, P. Lancellotti, R. Rimbas, D. M'barek, M. Cameli, Y. Katahira, S. Carerj, C. Grasso, P. Moulin, D. Lavergne, B. Merkely, D. Mahoney, C. Tamburino, W. Kosmala, G. Romagna, T. Potpara, T. Ha, R. Biffanti, C. Dundar, E. Gunyeli, L. Weinert, R. Dworakowski, A. Ferreira, T. Biering-Sorensen, H. Engblom, M. Erturk, G. Varlan, M. Ikeda, L. Thorell, S Von Bardeleben, S. Palomar, K. Boerlage-Van Dijk, T. Ishizu, S. Stoerk, I. Germanakis, H. Yamamoto, Q. Shang, A. Borizanova, C. Fiorentini, R. Candinas, U. Inci, F. Macedo, O. Huttin, R. Pudil, I. D. Gabric, C. Silveira, I. Sari, V. Lambadiari, L. Laczmanski, E. Timofeev, A. Izgi, D. Bravo Bustos, K. Wierzbowska-Drabik, P. Masci, H. Pusuroglu, F. Navarro Garcia, P. Adhikari, K. Mizia-Stec, S. Celik, A. Medressova, S. Pala, R. Retkoceri, O. Tautu, S. Tzikas, S. Ohtsuki, T. Akbulut, S. Goliszek, K. Mitsudo, P. Palczewski, A. Spyrou, K. Filipiak, I. Tzoulaki, A. Erdem, M. Krupa, K. Yoshida, M. Polovina, J. Vanoverschelde, H. Pereira, K. Obase, O. V. Tereshina, J. Liebeton, L. Petrescu, W. Gin-Sing, T. A. Warsame, B. Lichodziejewska, M. Takeuchi, J. Cuypers, Y. Jung, E. Martins, S. Mondillo, D. Liu, D. Planinc, I. Subirana, S. Shahrzad, U. Richter, M. Prull, C.H. Attenhofer Jost, E. Alfonzetti, A. Kosztin, V. Carvalho, M. van Bracht, K. Shahgaldi, M. Altman, A. Cacicedo, R. Dulgheru, M. Arslan, L. Dell'angela, M. De Biasio, J. Roos-Hesselink, A. Sawant, B. Ghadrdoust, H. Tabuchi, I. Rangel, M. Aguado Martin, L. Pedro-Botet, K. Koch, G. Zugazabeitia Irazabal, I. Hausmanowa-Petrusewicz, A. Werther-Evaldsson, A. Korshunova, Q. Zhang, A. Anton Ladislao, C. Bergerot, F. Karlsen, T. Akagi, M. Jasinski, I. Komuro, A. Apor, L. Fourcade, P. Argiento, E. Zemtsovsky, A. Correra, J. Chudek, S. Choi, G. Barletta, A. Varela, A. Manouras, H. Oe, A. D'andrea, S. Ramezani, M. Akil, A. Azevedo, S. Imme, A. Ionac, E. Saracoglu, K. Nakagawa, O. Vinter, S. Reeva, G. Van Camp, T. Forster, T. Butz, I. Ikonomidis, A. Costa, M. Ruiz Lopez, D. Vinereanu, G. Opolski, K. Akay, A. Vrublevsky, J. Silva Marques, L. Sousa, F. D'ascenzi, N. Oprescu, F. Veronesi, A. Mysiak, R. Dan, M. Nobre Menezes, D. Kim, V. Vida, Y. Kim, V. Di Bello, D. Sharif, A. I. Nagy, A. Sikora-Puz, H. Moladoust, C. Florescu, M. Kostrubiec, L. Pierard, E. Ural, A. Goncalves, K. Grudzka, A. Charalampopoulos, A. Luycx-Bore, M. Wilkins, S. Mushtaq, D. Messika-Zeitoun, N. Olsen, C. Mornos, M. Tesic, R. Symons, S. Bekbossynov, H. Erer, M. Kokorina, I. Joao, C. Cotrim, D. Voilliot, M. Yamawaki, N. Roszczyk, J. Inamo, C. Sousa, A. Porto, I. Lekakis, A. G. Caelian, D. Rigopoulos, T. Komori, G. Pontone, S. Scandura, F. Melao, N. Toh, A. Neikova, V. Aboyans, S. La Carrubba, D. Zamfir, S. Dymarkowski, J. Magne, G. Szeplaki, S. Velasco, J. Mcghie, M. Losito, L. Shkolnik, M. Petrovic, I. Papadakis, D. Brito, I. Schilling, O. Bech-Hanssen, M. Enriquez-Sarano, C. Lafaras, O. Enescu, B. Bijnens, R. Lang, C. Lestuzzi, C. Kirma, N. Vallejo, F. Elmkies, M. Vasatova, N. Uslu, M. Yuksel, M. Anastasiou-Nana, G. Gatti, O. Milanesi, V. Donghi, A. Kozuka, C. Henri, K. Tsimopoulou, G. Karakus, A. Cerutti, J. Macancela Quinonez, E. Laraudogoitia, P. Unger, A. Roijer, K. Kurnicka, M. Carasi, D. Djikic, M. Dragovic, H. Aksu, S. Srivatsa, A. Khan, N. Maschietto, D. Cozma, V. Andreakos, C. Meurling, O. Wendler, C. Doulaptsis, E. Aliot, T. Damy, Z. Ojaghihaghighi, L. Mateu, S. Knop, M. Vis, M. Mizia, A. Khalil, E. Abate, M. Gomez Recio, J. Ko, M. Seo, D. Tsiapras, E. Tekbas, C. Celeng, K. Aonuma, M. Przewlocka-Kosmala, S. Laaraibi, T. Sahin, D. Mohty, P. Jorgensen, A. Fiarresga, C. Scharf, E. Conte, V. Pergola, C. Jons, M. Padalino, R. Krecki, M. Malicse, F. Parthenakis, N. Bolivar Herrera, G. Foldes, O. Vriz, J. Kasprzak, S. Janssens, H. Bejiqi, H. Nakajima, R. Naeije, E. Papadavid, A. Subinas, R. Calabro, M. Trbusic, W. Tomkowski, M. Ooshima, A N Vachev, A. Fotaki, E. Brochet, F. Scholz, A. Boshchenko, P. Massoure, S. Munoz Troyano, J. Zumalde, M. Tsakalou, E. Bertella, M. Carminati, A. Kalkan, Y. Miyashita, I. Comanescu, A. M. Esen, K. Nakamura, A. Sanchez Espino, G. Berkenboom, H. Trappe, B. Castaldi, M. Cielecka-Prynda, Y. Otsuji, R. Bejiqi, E. Caiani, A. Moreo, P. Vaida, J. Castillo, S. Stankovic, C. Davos, H. Murata, T. Komiya, K. Berta, A. Aussoleil, A. Yildiz, B. Piamonti, K. Sato, J. Silva-Cardoso, I. Popescu, R. Pap, A. Serafin, K. Addetia, F. Olsen, J. Cautela, C. Yu, R. El Mahmoud, C. Cardoso, N. Echahidi, V. Pyankov, T. Yamada, R. Hoffmann, H. Johno, L. Lopes, R. Li, R. Onut, J. Lekakis, G. Nicolosi, N. Watanabe, Y. Basaran, A. Matos, A. Chmiel, N. Host, M. Sabria, N. Gronkova, P. Hulek, H. Cakmak, E. Wiegerinck, A. Goudev, A. Romero Pereiro, A. Pellegrini, L. Badano, P. Cameli, N. Abdullah, M. Deja, A. Ekmekci, A. Vahanian, A. Retkoceri, V. Mor-Avi, H. Ito, N. Bindraban, T. Rigo, R. Vanderpool, N. Mansencal, M. K. Tigen, J. Bech, H. Thibault, A. Pshepiy, A. Decker-Bellaton, L. Saghy, Z. Al Bulbul, G. Generati, I. Nedeljkovic, Y. Kuatbayev, G. A. Derumeaux, M. Varoudi, Y. Juilliere, K. Uno, P. Virot, B.M. van Dalen, M. Witsenburg, E. Yamashita, K. Okada, E. Gomez, P. Pinto-Teixeira, T. Yambe, N. Preumont, K. Hu, R. Jalalian, A. Formenti, M. Monaghan, P. Pruszczyk, L. Massa, D. Andreini, A. Fromm, E. Stoupel, D. Ural, R. Pilliere, L. Llobera, W. Kim, M. Sobczak, F. Bandera, S. Oliveira, P. Mills, H. Zemir, E. Oner, S. Sparla, C. Cosgrove, S. Kou, A. Annoni, B. Vujisic-Tesic, M. Hojati, L. Carr, P. Meimoun, A. Jaccard, E. Varotto, N. Bulj, T. Kawata, M. Bulut, G. Dimitriadis, B. Ramondo, V. Voudris, H. Christensen, H. Eguchi, J. Grapsa, P. R. Silva Fazendas Adame, C. Cimadevilla, L. Christensen, M. Cikes, A. Izawa, G. Merchan Ortega, A. Makrigiannakis, M. Forkmann, G. Radegran, P. Dias, A. Faiz, C. Stefopoulos, Y. Vasyuk, A. Akyol, L. Howard, A. Correia, J. Younger, and C. Greis

Subjects
medicine.medical_specialty, business.industry, medicine, Radiology, Nuclear Medicine and imaging, Medical physics, General Medicine, Session (computer science), Cardiology and Cardiovascular Medicine, business
Published
2013
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25. Metal-insulator transition and pseudogap inBi1.76Pb0.35Sr1.89CuO6+δhigh-Tccuprates

Author

Y. Tanabe, Kenji Kojima, Akihiro Koda, Ryosuke Kadono, M. Hiraishi, Y. Fukunaga, Tadashi Adachi, Yoji Koike, and M. Miyazaki

Subjects
Superconductivity, Physics, Spin glass, Condensed matter physics, Fermi level, Order (ring theory), Knight shift, symbols.namesake, Condensed Matter::Superconductivity, symbols, Condensed Matter::Strongly Correlated Electrons, Cuprate, Metal–insulator transition, Pseudogap
Abstract

It is inferred from bulk-sensitive muon Knight shift measurement for a ${\mathrm{Bi}}_{1.76}{\mathrm{Pb}}_{0.35}{\mathrm{Sr}}_{1.89}{\mathrm{CuO}}_{6+\ensuremath{\delta}}$ single-layer cuprate that the metal-insulator (MI) transition (in the low-temperature limit, $T\ensuremath{\rightarrow}0$) occurs at the critical hole concentration $p={p}_{\mathrm{MI}}=0.09(1)$, where the electronic density of states (DOS) at the Fermi level is reduced to zero by the pseudogap irrespective of the N\'eel order or spin glass magnetism. Superconductivity also appears for $pg{p}_{\mathrm{MI}}$, suggesting that this feature is controlled by the MI transition. More interestingly, the magnitude of the DOS reduction induced by the pseudogap remains unchanged over a wide doping range ($0.1\ensuremath{\le}p\ensuremath{\le}0.2$), indicating that the pseudogap remains as a hallmark of the MI transition for $pg{p}_{\mathrm{MI}}$.

Published
2016
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27. Fe-substitution Effects on the Cu-spin Correlation in La2-xSrxCu1-yFeyO4 Studied by Muon Spin Relaxation

Author

Kensuke M. Suzuki, Y. Tanabe, Isao Watanabe, Tadashi Adachi, Yasuyuki Ishii, Risdiana, Hidetaka Sato, Takao Suzuki, and Yoji Koike

Subjects
Superconductivity, Physics, La2−xSrxCu1−yFeyO4, Condensed matter physics, Magnetic order, Relaxation (NMR), Substitution (logic), Fe-substitution effect, Physics and Astronomy(all), Muon spin spectroscopy, muon spin relaxation, Condensed Matter::Superconductivity, Condensed Matter::Strongly Correlated Electrons, Cuprate, Spin-½, Magnetic impurity
Abstract

We have investigated the low-frequency Cu-spin dynamics of partially Fe-substituted La 2−x SrxCu 1−y FeyO4 with x = 0.06 – 0.235 and y = 0.01 from zero-field muon-spin-relaxation measurements. We find that the magnetic transition temperature, T mid N , is enhanced through the 1% Fe substitution in a wide range of hole concentration per Cu, N p, where superconductivity appears in La 2−x Sr x CuO 4 . The T mid N exhibits a local maximum at p ∼ 0.115 and exists even in the overdoped regime of p > 0.15. To the surprise, T mid N in the overdoped regime of 0.15 p ≤ 0.225 is larger than in the underdoped regime of 0.05 ≤ p ≤ 0.09. These results suggest that the substitution of Fe as a magnetic impurity is effective for the stabilization of the so-called stripe order in high- T c cuprates in the underdoped regime and that the nature of the magnetic order induced through the Fe substitution in the overdoped regime might be different from that in the underdoped regime.

Published
2012
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28. Poster presentation

Author

W. Kwong, A. L. Neilson, R. M. Hamilton, C. C. Chiu, E. A. Stephenson, G. J. Gross, L. Soucie, J. A. Kirsh, Z. xian-hui, T. Bao-peng, L. Jin-xin, Z. Yu, Z. Yan-yi, Z. Jiang-hua, T. Hirahara, Y. Sugawara, C. Suga, J. Ako, S. Momomura, A. V. Ardashev, E. G. Zhelyakov, A. V. Konev, M. S. Rybachenko, Y. N. Belenkov, R. Bai, L. Di Biase, P. Santangeli, L. C. Saenz, A. Verma, J. Sanchez, C. Tondo, A. Natale, F. Safari, S. Hajizadeh, A. Mani, A. Khoshbaten, M. Foadoddini, S. S. Forush, G. Bayat, S.-H. Kim, D. Chong, C. K. Ching, R. Liew, null Galalardin, M. W. Khin, W. S. Teo, B. Y. Tan, T. Sakamoto, M. Al Mehairi, S. A. Al Ghamdi, K. Dagriri, A. Al Fagih, R. Selvaraj, B. Ezhumalai, S. Satheesh, A. Ajit, P. Gobu, J. Balachander, X.-q. Liu, X. Zhou, G. Yang, G.-z. Zhong, L. Shi, Y. Tian, Y.-b. Li, A.-h. Wang, X.-c. Yang, S. Takenaka, H. Ozaki, M. Nakamura, M. Otsuka, Y. Tsurumi, G. Nolker, K. J. Gutleben, G. Ritscher, A. M. Sinha, B. Muntean, J. Heintze, J. Vogt, J. Brachmann, D. Horstkotte, T. Katsuyuki, F. McGrew, E. Johnson, M. Coppess, I. Fan, S. Li, L. Zhiyu, L. Zengzhang, L. Xianbin, Y. Yuehui, L. Min, Z. Shu-long, C. Dong, Z. Zhi-tao, W. Xian-jing, D. Ying-xue, Z. Shu-Long, Z. Zhi-Tao, W. Xian-Jing, D. Ying-Xue, P. Liu, J.-H. Guo, Z. Zhang, J. Li, H.-G. Liu, H.-C. Zhang, V. Zvereva, A. Rillig, U. Meyerfeldt, W. Jung, L. Wei, G. Qi, Q. Zhang, Y. Xia, A. Doi, K. Satomi, I. Nakajima, H. Makimoto, T. Yokoyama, Y. Yamada, H. Okamura, T. Noda, T. Aiba, W. Shimizu, N. Aihara, S. Kamakura, Z. Li, Q.-y. Zhao, C.-x. Huang, C. Min-Seok, P. Jeong-Wook, H. Young-Woong, P. Sung-Eun, U. Jae-Sun, O. Yong-Seog, S. Woo-Seung, K. Ji-Hoon, J. Seong-Won, L. Man-Young, R. Tae-Ho, J.-S. Uhm, Y.-S. Oh, M.-S. Choi, J.-W. Park, Y.-W. Ha, S.-E. Park, S.-W. Jang, W.-S. Shin, J.-H. Kim, M.-Y. Lee, T.-H. Rho, J. B. Nielsen, M. S. Olesen, M. Tango, S. Haunso, A. G. Holst, J. H. Svendsen, D. Poci, A.-M. Thogersen, S. Riahi, P. Linde, N. Edvardsson, C. W. Khoo, S. Krishnamoorthy, G. Dwivedi, B. Balakrishnan, H. S. Lim, G. Y. H. Lip, S. D'Ascia, C. D'ascia, V. Marino, M. Chiariello, G. Santulli, L. Music, K. Anderson, B. S. Benzaquen, C. Saponieri, H. Yassin, V. Fridman, B. C. Vasavada, G. Turitto, N. El-Sherif, H. Prabhu, Y. Huang, M. C. Ortega, E. S.-H. Sosa, A. N. Ugalde, A. Al Jamil, M. Abu Siddique, K. M. H. S. S. Haque, S.-i. Momomura, R. Mlynarski, A. Mlynarska, G. Ilczuk, J. Wilczek, M. Sosnowski, R. Kohno, H. Abe, T. Nagatomo, Y. Oginosawa, H. Minamiguchi, Y. Otsuji, S. Ekinci, M. Yesil, S. Bayata, V. K. Vurgun, E. Arikan, N. Postaci, R. Xiaoqing, P. Jielin, Z. Shu, M. Liang, W. Fangzheng, K. Takahashi, T. Tokano, Y. Nakazato, S. Doi, T. Shiozawa, H. Konishi, M. Hiki, Y. Kato, S. Komatsu, S. Takahashi, N. Kubota, H. Tamura, S. Suwa, M. Ohki, T. Katsumata, K. Kizu, F. Bito, M. Sumiyoshi, H. D. Juntendo, T. Yukoyama, F. Perna, M. Leo, L. Leccisotti, M. Casella, G. Pelargonio, M. Lago, G. Bencardino, M. L. Narducci, E. Russo, A. Giordano, F. Bellocci, T. Song, J. Yang, C. Huang, J. Zhang, P. Wu, Y. Chen, X. Fan, T. Wang, X. Wang, Y. Tang, C.-X. Huang, X.-R. Fan, Y.-J. Chen, X.-W. Li, T. Buescher, D. Obias-Manno, C.-J. Yoo, J. Huh, H. Nakanishi, A. Hirata, M. Wada, K. Kashiwase, M. Okada, Y. Ueda, D. Su, X. L. Niu, A. Q. Song, S. Fujii, Y. Yambe, K. Shiiba, M. Sakakibara, A. Watanabe, T. Wada, Y. Koide, M. Ikeda, H. Toda, K. Hashimoto, R. Terasaka, M. Nakahama, Y. Okada, H. Mizuno, H. Ide, T. Ueno, S. Kogaki, K. Ozono, S. Nanto, C. Statescu, R. Bercea, R. A. Sascau, C. A. Georgescu, E. Athanas, N. Y. Mironov, S. A. Bakalov, E. A. Jarova, E. S. Rodionova, N. A. Mironova, J. Kim, M. S. Ahn, D. C. Han, J. T. L. Choo, C. K. Chen, T. H. Tan, K. K. Ong, R. Kam, A. Curnis, L. Bontempi, G. Coppola, M. Cerini, F. Vassanelli, A. Lipari, F. Gennaro, C. Pagnoni, N. Ashofair, L. D. Cas, V. Gourineni, K.-L. Wong, R. Davoudi, N. Hamid, T. B. Yew, C. C. Keong, T. W. Siong, E. Fuke, H. Shimizu, S. Kimura, K. Hao, R. Watanabe, J.-B. Seo, W.-Y. Chung, M.-A. Kim, Z.-H. Zo, S. Krishinan, N. A. Skuratova, L. M. Belyaeva, M. H. Bae, J. H. Lee, H. S. Lee, D. H. Yang, H. S. Park, Y. Cho, S. C. Chae, J.-E. Jun, L. V. Rychkova, V. V. Dolgikh, L. V. Zurbanova, A. V. Zurbanov, A. Aleksanyan, A. Matevosyan, G. Podosyan, P. Zelveian, H. O. Choi, G.-B. Nam, Y. R. Kim, K. H. Kim, K.-J. Choi, Y.-H. Kim, H. A. P. Pakpahan, D. Wei, T. Qizhu, Y. Xiaofei, G. Kai, F. Siting, H. Ji, A. Sato, Y. Tanabe, Y. Hayashi, T. Yoshida, E. Ito, M. Chinushi, K. Hasegawa, N. Yagihara, K. Iijima, D. Izumi, H. Watanabe, H. Furushima, Y. Aizawa, Y.-x. Dong, J. C. Burnett, H. H. Chen, S. Sandberg, Y. Zhang, P.-S. Chen, Y.-M. Cha, X.-h. Zhou, B.-p. Tang, J.-x. Li, Y.-d. Li, J.-h. Zhang, P. Arsenos, K. Gatzoulis, T. Gialernios, P. Dilaveris, S. Sideris, S. Archontakis, D. Tsiachris, S. Christodoulos, Z. Feng, S. Baogui, L. Li, L. Ming, P. Mohanty, A. B. Hesselson, E. De Ruvo, P. L. Gallagher, M. Minati, L. C. A. Natale, G. F. Tomassoni, T. Gan, B. Tang, G. Xu, J. Hosoda, T. Ishikawa, K. Matsushita, K. Matsumoto, Y. Kimura, M. Miyamoto, T. Sugano, T. Ishigami, K. Uchino, K. Kimura, S. Umemura, T. Kurita, L. Ruan, C. Zhang, S. Cai, N. Liu, Y. Ruan, X. Quan, J. K. Kang, N. Y. Kim, S. H. Park, J. E. Jun, W. H. Park, O. V. Sapelnikov, R. S. Latypov, I. R. Grishin, Y. V. Mareev, M. A. Saidova, R. S. Akchurin, G. Manis, D. Mytas, T. Papafanis, M. V. Papavasileiou, C. Stefanadis, L.-N. Ren, X.-H. Fang, Y.-q. Wang, G.-X. Qi, Q.-x. Zeng, Z.-t. Zheng, J.-q. Zhong, Y.-l. Wang, H.-z. Liu, D.-l. Liu, X.-l. Meng, J.-s. Li, G.-y. Su, J. Wang, W. B. Nicolson, S. Kundu, N. Tyagi, P. D. S. Meatcher, S. Yusuf, M. Jeilan, P. J. Stafford, A. J. Sandilands, I. Loke, G. A. Ng, Y. Solak, E. E. Gul, H. Atalay, T. Abdulhalikov, M. Kayrak, S. Turk, A. V. Pogodina, O. V. Valjavskaja, Y. X. Chen, N. S. Luo, J. F. Wang, S. Zhang, S. Ishimaru, M. Miyakawa, R. Kakinoki, M. Tadokoro, S. Kitani, T. Sugaya, K. Nishimura, T. Igarashi, H. Okabayashi, J. Furuya, Y. Igarashi, K. Igarashi, T. Su, D. Winlaw, R. Chard, I. Nicholson, G. Sholler, K. Lau, Q. Sun, K.-p. Cheng, R. Cheng, W. Hua, J.-l. Pu, C. P. Lim, L. L. Chan, L. W. Teo, B. W. K. Kwok, D. K. L. Sim, D. Moneghini, R. Cestari, H. Al Shurafa, S. Al Ghamdi, A. Al Khadra, A. Agacdiken, I. Yalug, A. Vural, U. Celikyurt, D. Ural, T. Aker, E. Schloss, A. Auricchio, C. Zeng, L. Sterns, F. Farooqi, R. Kamdar, S. Adhya, S. Bayne, T. Jackson, L. Pollock, N. Gall, F. Murgatroyd, Y. Guo, Y. Wang, T. Yang, P. Zhu, H. Liu, Y. Zhao, L. Zhang, W. Gao, and M. Gao

Subjects
Physiology (medical), Cardiology and Cardiovascular Medicine
Published
2011
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29. Study of Water–Gas-Shift Reaction over La(1−y)SryNixCo(1−x)O3 Perovskite as Precursors

Author

Elisabete Moreira Assaf, Pedro A. P. Nascente, S. S. Maluf, and E. Y. Tanabe

Subjects
Strontium, Non-blocking I/O, Inorganic chemistry, Analytical chemistry, chemistry.chemical_element, General Chemistry, Catalysis, Water-gas shift reaction, X-ray photoelectron spectroscopy, chemistry, Lanthanum, Solubility, Perovskite (structure)
Abstract

The performance of La(1−y)SryNixCo(1−x)O3 perovskites for the water gas shift reaction (WGSR) was investigated. The samples were prepared by the co- precipitation method and were performed by the BET method, XRD, TPR, and XPS. The catalytic tests were performed at 300 and 400 °C and H2Ov/CO = 2.3/1 (molar ratio). The sample with the highest surface area is La0.70Sr0.30NiO3. The XRD results showed the formation of perovskite structure for all samples, and the La0.70Sr0.30NiO3 sample also presented peaks corresponding to La2NiO4 and NiO, indicating that the solubility limit of Sr in the perovskite lattice was surpassed. The replacement of Co by Ni favored the reduction of the species at lower temperatures, and the sample containing Sr presented the highest amount of reducible species, as identified by TPR results. All samples were active, the Sr containing perovskite appearing the most active due to the highest surface area, presence of the La2NiO4 phase, and higher content of Cu in the surface, as detected by XPS. Among the samples containing Co, the most active one was that with x = 0.70 (60% of CO conversion).

Published
2011
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30. Neuroimmunology (PP-012)

Author

M. Chou, T. Maruta, I. Zafir-Lavie, R. S. Duan, Y. Liu, A. L. Noçon, S. Oki, Y. Yoshida, B. Sebesho, S. Nakane, B. Grygier, M. Benkhoucha, W. Lason, B. Korzeniak, E. Saji, X. L. Li, F. T. M. Costa, J. Kira, V. Mehrotra, Y. Parman, S. J. Shilov, E. V. Yurkova, C. E. Prado, V. Lahiri, S. Miscia, J. Fraussen, H. A. González, A. Basta-Kaim, S. Crespo, Z. Layrisse, M. Sasaki, N. Ishii, L. Kellaway, C. Ono, M. R. Losen, J. I. Silverberg, M. Kobayashi, Y. C. Dou, M. Hamze Sinno, I. Illa, V. Amassian, V. Obando, Y. Ge, L. L. Cao, K. Vrolix, J. I. Shilov, H. Sakuma, M. Hsieh, A. León, I. L. Campbell, P. Oflazer, Helgi B. Schiöth, X. Zhang, R. Lachmann, P. Giraudon, G. Ramírez, J. Huang, S. L. Lim, L. Qian, C. W. Shi, H. Funakoshi, R. Orman, F. Kern, P. Lanuti, K. Barabás, J. Borges, C. Benetollo, M. J. Barrientos, R. Pacheco, E. Martinez, W. Kuehnel, A. F. Longhini, D. J. Shilov, N. Hsu, P. H. Lalive, R. L. Talaisys, M. Santiago-Raber, M. Garcia, M. Leskiewicz, A. S. Farias, F. Deymeer, M. Jacobs, O. Cohen-Inbar, J. P. K. Ip, S. Aiba, S. Cavagna, A. Blanco, N. Tabet, H. Duan, K. Arashidani, H. Yoshikawa, G. Saruhan-Direskeneli, T. Nishimura, P. Déchelotte, I. Sora, J. Kusmierczyk, C. Klemann, F. Aysal, I. Campagna, V. Roudenok, T. Matsushita, H. Wang, N. Guo, K. Yanagawa, P. A. Díaz, S. C. P. Lopes, N. Kunugita, Y. Takahama, T. Yamamura, H. Kitamura, I. Székács, T. Mardovina, A. Sokal, K. Tárnok, S. O. Fetissov, H. Sytwu, N. S. Cedeño, Y. Tanabe, N. Isobe, S. Alvarez, Q. R. R. Coquerel, B. J. E. Raveney, M. Fresno, M. Muñoz-Fernández, M. Shi, X. Q. Zhang, K. Tanji, Y. C. Blanco, Y. Gao, P. Hung, M. Chang, R. Marignier, M. Ferbabdez-Mestre, J. Detka, K. Wakabayashi, P. Gruca, H. Fujimaki, Z. Yu, P. Martinez-Martinez, M. Nishizawa, Y. Wang, H. Zhang, D. B. Ginsburg, P. Randall, J. Do Rego, J. Van den Broeck, H. Tomita, N. Matsui, M. Chofflon, L. Hong, C. Juarez, N. Allie, M. Regulska, I. Kawachi, J. Szelényi, D. Liu, T. Win Shwe, L. Querol, F. Hernández, V. Yilmaz, E. Meulemans, H. Direskeneli, E. Madarász, K. Sugai, W. Lee, M. Stewart, A. Nicolle, M. Zaaroor, M. Kubera, M. Tanaka, V. Somers, M. Varrin-Doyer, S. Chen, Y. Reiter, K. Lin, E. Moga, L. M. B. Santos, A. Roman, B. Budziszewska, H. G. Durkin, M. H. De Baets, and T. Nakamura

Subjects
Neuroimmunology, Philosophy, Immunology, Immunology and Allergy, General Medicine, Neuroscience
Published
2010
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32. Structural phase transition in Bi2Te3 under high pressure

Author

Satoshi Nakano, M. Einaga, A. Nakayama, Yuh Yamada, Fumihiro Ishikawa, and Y Tanabe

Subjects
Superconductivity, Diffraction, Phase transition, Materials science, Electrical resistance and conductance, Structural change, Condensed matter physics, biology, Hydrostatic pressure, Fermi surface, Condensed Matter Physics, biology.organism_classification, Valencia
Abstract

Structural change in Bi2Te3 under high pressure up to 16.6 GPa has been studied by powder x-ray diffraction. We observed two times of phase transitions at room temperature at the pressures of 8 and 14 GPa, respectively. According to our preliminary result on electrical resistance, it is reasonable to suppose that superconducting transition with T c =2.8 K at the pressures of 10.2 GPa is observed in phase II. On the other hand, we found anomalies of the pressure dependences of lattice parameters and volume at around 2 GPa, which probably means the change in electrical structure on the Fermi surface. †This paper was presented at the XLVIth European High Pressure Research Group (EHPRG 46) Meeting, Valencia (Spain), 7–12 September, 2008.

Published
2009
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33. Nationwide surveillance of bacterial respiratory pathogens conducted by the Japanese Society of Chemotherapy in 2007: general view of the pathogens’ antibacterial susceptibility

Author

Y. Niki, T. Matsumoto, S. Kohno, N. Aoki, A. Watanabe, J. Sato, R. Hattori, M. Terada, N. Koashi, T. Kozuki, A. Maruo, K. Morita, K. Ogasawara, Y. Takahashi, J. Watanabe, K. Sunakawa, K. Totsuka, H. Hanaki, M. Yagisawa, K. Takeuchi, S. Fujimura, H. Takeda, H. Ikeda, N. Sato, K. Niitsuma, M. Saito, S. Koshiba, M. Kaneko, M. Miki, S. Nakanowatari, Y. Honda, J. Chiba, H. Takahashi, M. Utagawa, T. Kondo, A. Kawana, H. Konosaki, Y. Aoki, H. Ueda, H. Sugiura, M. Ichioka, H. Goto, D. Kurai, M. Okazaki, K. Yoshida, T. Yoshida, Y. Tanabe, S. Kobayashi, M. Okada, H. Tsukada, Y. Imai, Y. Honma, K. Nishikawa, T. Yamamoto, A. Kawai, T. Kashiwabara, Y. Takesue, Y. Wada, K. Nakajima, H. Toda, N. Mitsuno, H. Sugimura, S. Yoshioka, M. Kurokawa, Y. Munekawa, H. Nakajima, S. Kubo, Y. Ohta, K. Mikasa, K. Maeda, K. Kasahara, A. Koizumi, R. Sano, S. Yagi, M. Takaya, Y. Kurokawa, N. Kusano, E. Mihara, M. Kuwabara, Y. Fujiue, T. Ishimaru, N. Matsubara, Y. Kawasaki, H. Tokuyasu, K. Masui, K. Negayama, N. Ueda, M. Ishimaru, Y. Nakanishi, M. Fujita, J. Honda, J. Kadota, K. Hiramatsu, Z. Nagasawa, M. Suga, H. Muranaka, K. Yanagihara, J. Fujita, and M. Tateyama

Subjects
Adult, Microbiology (medical), Imipenem, Respiratory tract infection, Klebsiella pneumoniae, Resistance, Microbial Sensitivity Tests, Biology, medicine.disease_cause, Gram-Positive Bacteria, Microbiology, Haemophilus influenzae, Moraxella catarrhalis, Japan, Ampicillin, Streptococcus pneumoniae, Drug Resistance, Bacterial, Gram-Negative Bacteria, medicine, Humans, Pharmacology (medical), Respiratory Tract Infections, Surveillance, Bacterial Infections, biology.organism_classification, Anti-Bacterial Agents, Ciprofloxacin, Infectious Diseases, Amikacin, Susceptibility, medicine.drug
Abstract

For the purpose of a nationwide surveillance of the antimicrobial susceptibility of bacterial respiratory pathogens in patients in Japan, the Japanese Society of Chemotherapy conducted their second year survey, during the period from January to August, 2007. A total of 1178 strains were collected from clinical specimens obtained from adult patients with well-diagnosed respiratory tract infections. Susceptibility testing was evaluable for 1108 strains (226 Staphylococcus aureus, 257 Streptococcus pneumoniae, 6 Streptococcus pyogenes, 206 Haemophilus influenzae, 120 Moraxella catarrhalis, 122 Klebsiella pneumoniae, and 171 Pseudomonas aeruginosa). A total of 44 antibacterial agents, including 26 beta-lactams (four penicillins, three penicillins in combination with beta-lactamase inhibitors, four oral cephems, eight parenteral cephems, one monobactam, five carbapenems, and one penem), three aminoglycosides, four macrolides (including ketolide), one lincosamide, one tetracycline, two glycopeptides, six fluoroquinolones, and one oxazolidinone were used for the study. Analysis was conducted at the central reference laboratory according to the method recommended by the Clinical and Laboratory Standards Institute (CLSI). The incidence of methicillinresistant Staphylococcus aureus (MRSA) was high, at 59.7%, and the incidences of penicillin-intermediateresistant and -resistant Streptococcus pneumoniae (PISP and PRSP) were 30.4% and 5.1%, respectively. Among Haemophilus influenzae strains, 19.9% of them were found to be beta-lactamase-non-producing ampicillin (ABPC)-intermediately-resistant (BLNAI), 29.1% to be beta-lactamasenon-producing ABPC-resistant (BLNAR), and 6.7% to be beta-lactamase-producing ABPC-resistant (BLPAR) strains. Extended-spectrum beta-lactamase-producing Klebsiella pneumoniae was not isolated. Two isolates (1.2%) of Pseudomonas aeruginosa were found to be metallo-beta-lactamase-producing strains, including one (0.6%) suspected multidrug-resistant strain showing resistance to imipenem, amikacin, and ciprofloxacin. These data will be a useful reference for future periodic surveillance studies and for investigations to control resistant infections as well. Continued surveillance is required to prevent the further spread of these antimicrobial resistances.

Published
2009
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34. Renal Dysplasia Unrelated to Claudin-16 Deficiency in Japanese Black Cattle

Author

T. Takeuchi, Kiyokazu Ozaki, Isao Narama, Y. Tanabe, Akihiko Sugiyama, and Miyazaki

Subjects
Heterozygote, Pathology, medicine.medical_specialty, Cattle Diseases, Biology, Kidney, Pathology and Forensic Medicine, Japan, medicine, Animals, Multicystic Dysplastic Kidney, Claudin, Medulla, Basement membrane, General Veterinary, Homozygote, Mesenchymal stem cell, Japanese Black cattle, Membrane Proteins, Renal dysplasia, Epithelium, medicine.anatomical_structure, Gene Expression Regulation, Claudins, Cattle
Abstract

Summary Renal lesions of the type usually found in claudin-16 (CL-16) defective Japanese Black cattle (homozygous for CL-16 deficiency) were identified in six animals of this breed, aged 28–59 months, which were either heterozygous for CL-16 deficiency (type 1) or normal, as judged by a DNA-based test associated with the CL-16 gene. Histopathologically, all six cases showed elongated focal lesions which ran through the cortex to terminate in the outer zone of the medulla. The lesions contained components that included: (1) immature tubules, (2) small irregularly shaped tubules with thickening of the basement membrane, (3) mesenchymal cells in an increased interstitium, (4) small atrophic glomeruli, and (5) immature glomeruli. The glomeruli were noticeably reduced in number, and large glomeruli with an increased number of mesangial cells were observed throughout the entire cortical area. Cystic dilation of tubules and flattening of the epithelium were noted in all areas of the kidney. Histopathologically, the renal lesions in the six cases were indistinguishable from those reported previously in cattle homozygous for CL-16 deficiency. These findings demonstrate that such renal lesions in Japanese Black cattle are not necessarily associated with homozygous deletion of the CL-16 gene.

Published
2007
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35. Exact Time Integration for Dynamic Interaction of High-Speed Train and Railway Structure Including Derailment During an Earthquake

Author

Y. Tanabe, Makoto Tanabe, Nobuyuki Matsumoto, Hajime Wakui, and Masamichi Sogabe

Subjects
Engineering, Derailment, business.industry, Applied Mathematics, Mechanical Engineering, Structure (category theory), Equations of motion, High speed train, 02 engineering and technology, General Medicine, Structural engineering, 01 natural sciences, Displacement (vector), 020303 mechanical engineering & transports, 0203 mechanical engineering, Control and Systems Engineering, 0103 physical sciences, Train, business, 010301 acoustics
Abstract

A robust and efficient computational method to solve the dynamic interaction of a high-speed train and railway structure including derailment during an earthquake is given. Mechanical models to express contact–impact behaviors during and after derailment are described. A modal reduction has been developed to solve nonlinear equations of motions of the train and railway structure effectively. The exact time integration in the modal coordinate is given that is free from the round-off error normally appeared in the numerical time integration for very small time increments to solve the interaction including derailment during an earthquake. Some examples are demonstrated.

Published
2015
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36. Emergence of high-mobility minority holes in the electrical transport of theBa(Fe1−xMnxAs)2iron pnictides

Author

Y. Tanabe, Kenji Watanabe, Satoshi Heguri, Takahiro Urata, Hidetoshi Oguro, Khuong Kim Huynh, and Katsumi Tanigaki

Subjects
Superconductivity, Physics, Electrical transport, Condensed matter physics, Hall effect, Low magnetic field, Doping, Mn doping, Electron, Condensed Matter Physics, Pnictogen, Electronic, Optical and Magnetic Materials
Abstract

In Fe pnictide (Pn) superconducting materials, neither Mn nor Cr doping to the Fe site induces superconductivity, even though hole carriers are generated. This is in strong contrast with the superconductivity appearing when holes are introduced by alkali-metal substitution on the insulating blocking layers. We investigate in detail the effects of Mn doping on magnetotransport properties in $\mathrm{Ba}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}{)}_{2}$ for elucidating the intrinsic reason. The negative Hall coefficient for $x\phantom{\rule{0.28em}{0ex}}=\phantom{\rule{0.28em}{0ex}}0$ estimated in the low magnetic field $(B)$ regime gradually increases as $x$ increases, and its sign changes to a positive one at $x\phantom{\rule{0.28em}{0ex}}=\phantom{\rule{0.28em}{0ex}}0.020$. Hall resistivities as well as simultaneous interpretation using the magnetoconductivity tensor including both longitudinal and transverse transport components clarify that minority holes with high mobility are generated by the Mn doping via spin-density wave transition at low temperatures, while original majority electrons and holes residing in the paraboliclike Fermi surfaces of the semimetallic $\mathrm{Ba}(\mathrm{FeAs}{)}_{2}$ are negligibly affected. Present results indicate that the mechanism of hole doping in $\mathrm{Ba}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}{)}_{2}$ is greatly different from that of the other superconducting FePn family.

Published
2015
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37. Evaluation of Microbiological Screening Systems Using Dental Plaque Specimens from Young Children Aged 6–36 Months

Author

H. Lilli, B.F. Turng, G E Minah, N. Tinanoff, J.H. Park, and Y. Tanabe

Subjects
Orthodontics, DMF Index, business.industry, Dental Plaque, Infant, Dentistry, Dental Caries, medicine.disease, Dental plaque, Bacterial Typing Techniques, law.invention, stomatognathic diseases, stomatognathic system, law, Child, Preschool, medicine, Humans, Cotton swab, business, General Dentistry, Early childhood caries
Abstract

Using cotton swab specimens of dental plaque from children aged 6–36 months, four commercial chairside tests for oral bacteria were evaluated by comparison with conventional selective culture: mitis salivarius kanamycin bacitracin agar for mutans streptococci and Rogosa SL agar for lactobacilli. Representative colonies of all isolates were identified by commercial identification kits. According to qualitative evaluations, all chairside tests for mutans streptococci were effective in our population. Those for lactobacilli were not as effective, due mainly to a high recovery of yeast contaminants.

Published
2006
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38. Novel spatiotemporal equalization based on cascaded connection of multibeam adaptive array and multi-input MLSE

Author

A. Hanaki, Takeo Ohgane, Yasutaka Ogawa, and Y. Tanabe

Subjects
Adaptive filter, Computer science, Applied Mathematics, Multi input, Statistics, Equalization (audio), Equalizer, Electrical and Electronic Engineering, Maximum likelihood sequence estimation, Algorithm, Computer Science Applications, Connection (mathematics)
Abstract

This paper proposes a novel spatiotemporal equalizer using a cascaded connection of multibeam adaptive array and multi-input maximum likelihood sequence estimation (MLSE) based on single-user detection. The computational load for the proposed method is much lower than that of the optimal method, and computer simulations revealed that its bit-error-rate (BER) performance is identical to that of the optimal method. Theoretical analysis also supports equivalency between these methods.

Published
2005
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39. Direct optical excitation of two and three magnons in α-Fe2O3

Author

Eiichi Hanamura, K. Kojima, S. Azuma, Y. Tanabe, T. Matsuo, S. Onari, Y. Fujimaki, and S. Uchida

Subjects
Imagination, Materials science, Physics and Astronomy (miscellaneous), Condensed Matter::Other, business.industry, media_common.quotation_subject, Magnon, General Physics and Astronomy, Infrared spectroscopy, Polarization (waves), Molecular physics, Spectral line, symbols.namesake, Raman scattering spectra, Optics, symbols, Condensed Matter::Strongly Correlated Electrons, Raman spectroscopy, business, Excitation, media_common
Abstract

Direct excitation of two and three magnons is observed in mid-infrared absorption and Raman scattering spectra of α-Fe2O3 crystals. These polarization characteristics and the spectra themselves are shown to be understood from group-theoretical point of view. The microscopic mechanism of three-magnon excitation is proposed in addition to that of well-known two-magnon excitation process.

Published
2005
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41. Cooperation during dental treatment: the Children's Fear Survey Schedule in Japanese children

Author

Y. Tanabe, Tomiko Sano, M. K. M. Yamada, and Tadashi Noda

Subjects
medicine.medical_specialty, genetic structures, business.industry, Dental fear, medicine.disease, stomatognathic diseases, stomatognathic system, Dental clinic, Physical therapy, Medicine, Cooperative group, Fear survey schedule, business, Psychiatry, General Dentistry
Abstract

Summary. Objective. The aim of this study was to evaluate dental fear and cooperation during dental treatment using the Children's Fear Survey Schedule – Dental Subscale (CFSS-DS). Methods. From the behaviour assessment of regular patients of the Pediatric Dental Clinic in Niigata University Dental Hospital (aged 5–12 years old), the patients were classified into two groups: uncooperative and cooperative. CFSS-DS questionnaires were sent to a total of 295 patients, 186 of which were returned, 61 from the uncooperative group and 125 from the cooperative group. Results. In the uncooperative and the cooperative groups, the CFSS-DS mean total scores were 31·79 and 24·02 (P

Published
2002
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42. A current-sensed high-speed and low-power first-in-first-out memory using a wordline/bitline-swapped dual-port SRAM cell

Author

Nobutaro Shibata, Mayumi Watanabe, and Y. Tanabe

Subjects
Engineering, Hardware_MEMORYSTRUCTURES, business.industry, Sense amplifier, FIFO (computing and electronics), Electrical engineering, Semiconductor memory, FIFO and LIFO accounting, CMOS, Memory cell, Low-power electronics, Hardware_INTEGRATEDCIRCUITS, Electronic engineering, Electrical and Electronic Engineering, business, NMOS logic
Abstract

First-in-first-out (FIFO) data storages are in great demand for telecommunication LSIs. This paper presents high-speed and low-power CMOS memory techniques specialized for FIFO operation. A size-configurable architecture using the tile methodology is employed to customize the word counts and/or data bits with a. short time of less than 30 min. Four flag bits are introduced to inform the internal state of FIFO memories. To obtain a higher operating speed, an SRAM-like memory cell with current-sense readout is used. The critical-path delay of the Gray-code up/down counter, indicating the stored data volume, is shortened to 6.0 ns (66%) by using a double-rail single-stage XOR circuit. As to the low-power techniques, a wordline/bitline-swapped dual-port memory-cell architecture is proposed to cut off the static power-supply current of unselected columns. By using the hidden blanket-precharged bitline scheme, the power dissipation of the writing circuitry is minimized without degrading the operating speed. A new data-driven gated-shift-pulse architecture is also proposed to reduce the power dissipation of shift-register-type address pointers (1.5 mW at 100 MHz). A 2K-words /spl times/ 8-bits FIFO memory test chip, fabricated with a 0.6-/spl mu/m CMOS process (a short effective channel length of 0.35 /spl mu/m is available for both the nMOS and pMOS), has demonstrated the 140-MHz operation at a typical 3.3-V power supply. The power dissipation in standby is less than 0.1 /spl mu/W and that at 100-MHz dual-port operation with single fan-out loads is in the range from 28 mW (in the best case with the M-scan test pattern) to 46 mW (in the worst case with the checkerboard test pattern).

Published
2002
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45. Influence of Instructor Personality on Student Evaluation of Teaching: A Comparison between English Majors and Non-English Majors

Author

Setsuko Mori and Y. Tanabe

Subjects
Linguistics and Language, Class (computer programming), Extraversion and introversion, media_common.quotation_subject, Applied psychology, Foreign language, Neuroticism, Language and Linguistics, Education, Course evaluation, Scale (social sciences), Mathematics education, Personality, Statistical analysis, Psychology, media_common
Abstract

160 non-English major students studying at a four-year university and 193 English major students studying at a career college of foreign language in Japan completed a questionnaire regarding instruction and instructor personality. The purpose of the current study was to examine whether the students’ instructional and personality ratings predicted their general evaluation of course. This study also investigated whether the relations between instructional and personality ratings and the general course evaluation varied by major. A significant correlation was found between the instructional scale and the overall evaluation of the course regardless of students’ majors: The more the students found the class interesting and was appropriately managed, the higher the overall evaluation. However, the findings indicate that while teacher’s extroversion, thoughtfulness and neuroticism mattered to the non-English major group when evaluating the overall effectiveness of the class, teacher personality did not influence the English major group. The authors believe the findings of the present study could contribute to a better understanding of the nature of student evaluations that have always been a source of controversy, and sometimes discontent during their history.

Published
2014
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47. Kondo-like mass enhancement of Dirac fermions in Ba(Fe1−xMnxAs)2

Author

Hidetoshi Oguro, Satoshi Heguri, Y. Tanabe, Kenji Watanabe, Katsumi Tanigaki, Takahiro Urata, and Khuong Kim Huynh

Subjects
Physics, Magnetoresistance, Condensed matter physics, Scattering, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Renormalization, symbols.namesake, Effective mass (solid-state physics), Dirac fermion, Impurity, Electrical resistivity and conductivity, symbols, Condensed Matter::Strongly Correlated Electrons, Magnetic impurity
Abstract

The effect of Mn substitution, acting as a magnetic impurity for Fe, on the Dirac cone was investigated in Ba(Fe${}_{1\ensuremath{-}x}$Mn${}_{x}$As)${}_{2}$. Both magnetoresistance and Hall resistivity studies clearly indicate that the cyclotron effective mass (${m}^{*}$) of the Dirac cone is anomalously enhanced at low temperatures by the impurity, although its evolution as a function of carrier number proceeds in a conventional manner at higher temperatures. Kondo-like band renormalization induced by the magnetic impurity scattering is suggested as the most plausible explanation for this, and the anomalous mass enhancement of the Dirac fermions is discussed.

Published
2014
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49. Polarity of High-Quality Indium Nitride Grown by RF Molecular Beam Epitaxy

Author

Tomohiro Yamaguchi, Yoshiki Saito, Tsutomu Araki, Nobuaki Teraguchi, Akira Suzuki, Yasushi Nanishi, and Y. Tanabe

Subjects
Indium nitride, Reflection high-energy electron diffraction, Polarity (physics), Analytical chemistry, chemistry.chemical_element, Nitride, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Electron diffraction, Sapphire, Indium, Molecular beam epitaxy
Abstract

We have evaluated the polarity of single-crystalline InN using coaxial impact collision ion scattering spectroscopy (CAICISS). The polarity of rf-MBE grown InN on sapphire was found to depend on growth temperature. Nitrogen polarity was observed for low temperature grown InN at 300 °C. On the other hand, high temperature grown InN at 550 °C showed primarily indium polarity. Furthermore, a mixture of indium polarity and nitrogen polarity was observed for two-step grown InN. A GaN cap layer was grown on InN to infer the polarity of InN. From reflection high-energy electron diffraction observations, GaN grown on low temperature grown InN showed a (3 x 3) reconstruction pattern, whereas GaN grown on high temperature grown InN showed a (2 x 2) reconstruction pattern. These results suggest that the polarity of InN is much more sensitive to growth temperature compared with other nitride semiconductors.

Published
2001
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50. Magnetocaloric effects of Laves phase Er(Co1−Ni )2 compounds

Author

Y. Tanabe, Hideyuki Sato, Hirofumi Wada, Hitoshi Sugawara, and Motoki Shiga

Subjects
Magnetic measurements, Specific heat, Condensed matter physics, Chemistry, Mechanical Engineering, Metals and Alloys, Laves phase, Heat capacity, Magnetization, Mechanics of Materials, Materials Chemistry, Magnetic refrigeration, Curie temperature, Crystallite
Abstract

The magnetocaloric effect (MCE) has been studied for ErCo2 single crystals and Er(Co1−xNix)2 polycrystalline samples with x≤0.10 by means of specific heat measurements and magnetization measurements. The magnetocaloric properties estimated from the calorimetric study are in agreement with those from the magnetization measurements for ErCo2 which undergoes a first-order magnetic transition at 32 K. The substitution of 10% Ni for Co lowers the Curie temperature from 32 to 13 K. Although the first-order transition vanishes at around x=0.05, the large MCE is retained for x=0.10. The results suggest a high potential of Er(Co1−xNix)2 as active magnetic regenerative materials.

Published
2001
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