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1. PitVis-2023 Challenge: Workflow Recognition in videos of Endoscopic Pituitary Surgery

Author

Das, Adrito, Khan, Danyal Z., Psychogyios, Dimitrios, Zhang, Yitong, Hanrahan, John G., Vasconcelos, Francisco, Pang, You, Chen, Zhen, Wu, Jinlin, Zou, Xiaoyang, Zheng, Guoyan, Qayyum, Abdul, Mazher, Moona, Razzak, Imran, Li, Tianbin, Ye, Jin, He, Junjun, Płotka, Szymon, Kaleta, Joanna, Yamlahi, Amine, Jund, Antoine, Godau, Patrick, Kondo, Satoshi, Kasai, Satoshi, Hirasawa, Kousuke, Rivoir, Dominik, Pérez, Alejandra, Rodriguez, Santiago, Arbeláez, Pablo, Stoyanov, Danail, Marcus, Hani J., and Bano, Sophia

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

The field of computer vision applied to videos of minimally invasive surgery is ever-growing. Workflow recognition pertains to the automated recognition of various aspects of a surgery: including which surgical steps are performed; and which surgical instruments are used. This information can later be used to assist clinicians when learning the surgery; during live surgery; and when writing operation notes. The Pituitary Vision (PitVis) 2023 Challenge tasks the community to step and instrument recognition in videos of endoscopic pituitary surgery. This is a unique task when compared to other minimally invasive surgeries due to the smaller working space, which limits and distorts vision; and higher frequency of instrument and step switching, which requires more precise model predictions. Participants were provided with 25-videos, with results presented at the MICCAI-2023 conference as part of the Endoscopic Vision 2023 Challenge in Vancouver, Canada, on 08-Oct-2023. There were 18-submissions from 9-teams across 6-countries, using a variety of deep learning models. A commonality between the top performing models was incorporating spatio-temporal and multi-task methods, with greater than 50% and 10% macro-F1-score improvement over purely spacial single-task models in step and instrument recognition respectively. The PitVis-2023 Challenge therefore demonstrates state-of-the-art computer vision models in minimally invasive surgery are transferable to a new dataset, with surgery specific techniques used to enhance performance, progressing the field further. Benchmark results are provided in the paper, and the dataset is publicly available at: https://doi.org/10.5522/04/26531686.

Published
2024

2. MuST: Multi-Scale Transformers for Surgical Phase Recognition

Author

Pérez, Alejandra, Rodríguez, Santiago, Ayobi, Nicolás, Aparicio, Nicolás, Dessevres, Eugénie, and Arbeláez, Pablo

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

Phase recognition in surgical videos is crucial for enhancing computer-aided surgical systems as it enables automated understanding of sequential procedural stages. Existing methods often rely on fixed temporal windows for video analysis to identify dynamic surgical phases. Thus, they struggle to simultaneously capture short-, mid-, and long-term information necessary to fully understand complex surgical procedures. To address these issues, we propose Multi-Scale Transformers for Surgical Phase Recognition (MuST), a novel Transformer-based approach that combines a Multi-Term Frame encoder with a Temporal Consistency Module to capture information across multiple temporal scales of a surgical video. Our Multi-Term Frame Encoder computes interdependencies across a hierarchy of temporal scales by sampling sequences at increasing strides around the frame of interest. Furthermore, we employ a long-term Transformer encoder over the frame embeddings to further enhance long-term reasoning. MuST achieves higher performance than previous state-of-the-art methods on three different public benchmarks.

Published
2024

4. Non-resonant electric quantum control of individual on-surface spins

Author

Rodríguez, Santiago A., Gómez, Sergio S., Fernández-Rossier, Joaquín, and Ferrón, Alejandro

Subjects
Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Quantum control techniques play an important role in manipulating and harnessing the properties of different quantum systems, including isolated atoms. Here, we propose to achieve quantum control over a single on-surface atomic spin using Landau-Zener-St\"uckelberg-Majorana (LZSM) interferometry implemented with Scanning Tunneling Microscopy (STM). Specifically, we model how the application of time-dependent, non-resonant AC electric fields across the STM tip-surface gap makes it possible to achieve precise quantum state manipulation in an isolated Fe atom on a MgO/Ag(100) surface. We propose a protocol to combine Landau Zener tunneling with LZSM interferometry that permits one to measure the quantum spin tunneling of an individual Fe atom. The proposed experiments can be implemented with ESR-STM instrumentation, opening a new venue in the research of on-surface single spin control., Comment: 6 pages, 4 figures

Published
2024

5. Pixel-Wise Recognition for Holistic Surgical Scene Understanding

Author

Ayobi, Nicolás, Rodríguez, Santiago, Pérez, Alejandra, Hernández, Isabela, Aparicio, Nicolás, Dessevres, Eugénie, Peña, Sebastián, Santander, Jessica, Caicedo, Juan Ignacio, Fernández, Nicolás, and Arbeláez, Pablo

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence, Computer Science - Machine Learning
Abstract

This paper presents the Holistic and Multi-Granular Surgical Scene Understanding of Prostatectomies (GraSP) dataset, a curated benchmark that models surgical scene understanding as a hierarchy of complementary tasks with varying levels of granularity. Our approach encompasses long-term tasks, such as surgical phase and step recognition, and short-term tasks, including surgical instrument segmentation and atomic visual actions detection. To exploit our proposed benchmark, we introduce the Transformers for Actions, Phases, Steps, and Instrument Segmentation (TAPIS) model, a general architecture that combines a global video feature extractor with localized region proposals from an instrument segmentation model to tackle the multi-granularity of our benchmark. Through extensive experimentation in ours and alternative benchmarks, we demonstrate TAPIS's versatility and state-of-the-art performance across different tasks. This work represents a foundational step forward in Endoscopic Vision, offering a novel framework for future research towards holistic surgical scene understanding., Comment: Preprint submitted to Medical Image Analysis. Official extension of previous MICCAI 2022 (https://link.springer.com/chapter/10.1007/978-3-031-16449-1_42) and ISBI 2023 (https://ieeexplore.ieee.org/document/10230819) orals. Data and codes are available at https://github.com/BCV-Uniandes/GraSP

Published
2024

7. SAR-RARP50: Segmentation of surgical instrumentation and Action Recognition on Robot-Assisted Radical Prostatectomy Challenge

Author

Psychogyios, Dimitrios, Colleoni, Emanuele, Van Amsterdam, Beatrice, Li, Chih-Yang, Huang, Shu-Yu, Li, Yuchong, Jia, Fucang, Zou, Baosheng, Wang, Guotai, Liu, Yang, Boels, Maxence, Huo, Jiayu, Sparks, Rachel, Dasgupta, Prokar, Granados, Alejandro, Ourselin, Sebastien, Xu, Mengya, Wang, An, Wu, Yanan, Bai, Long, Ren, Hongliang, Yamada, Atsushi, Harai, Yuriko, Ishikawa, Yuto, Hayashi, Kazuyuki, Simoens, Jente, DeBacker, Pieter, Cisternino, Francesco, Furnari, Gabriele, Mottrie, Alex, Ferraguti, Federica, Kondo, Satoshi, Kasai, Satoshi, Hirasawa, Kousuke, Kim, Soohee, Lee, Seung Hyun, Lee, Kyu Eun, Kong, Hyoun-Joong, Fu, Kui, Li, Chao, An, Shan, Krell, Stefanie, Bodenstedt, Sebastian, Ayobi, Nicolas, Perez, Alejandra, Rodriguez, Santiago, Puentes, Juanita, Arbelaez, Pablo, Mohareri, Omid, and Stoyanov, Danail

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence, Computer Science - Machine Learning
Abstract

Surgical tool segmentation and action recognition are fundamental building blocks in many computer-assisted intervention applications, ranging from surgical skills assessment to decision support systems. Nowadays, learning-based action recognition and segmentation approaches outperform classical methods, relying, however, on large, annotated datasets. Furthermore, action recognition and tool segmentation algorithms are often trained and make predictions in isolation from each other, without exploiting potential cross-task relationships. With the EndoVis 2022 SAR-RARP50 challenge, we release the first multimodal, publicly available, in-vivo, dataset for surgical action recognition and semantic instrumentation segmentation, containing 50 suturing video segments of Robotic Assisted Radical Prostatectomy (RARP). The aim of the challenge is twofold. First, to enable researchers to leverage the scale of the provided dataset and develop robust and highly accurate single-task action recognition and tool segmentation approaches in the surgical domain. Second, to further explore the potential of multitask-based learning approaches and determine their comparative advantage against their single-task counterparts. A total of 12 teams participated in the challenge, contributing 7 action recognition methods, 9 instrument segmentation techniques, and 4 multitask approaches that integrated both action recognition and instrument segmentation. The complete SAR-RARP50 dataset is available at: https://rdr.ucl.ac.uk/projects/SARRARP50_Segmentation_of_surgical_instrumentation_and_Action_Recognition_on_Robot-Assisted_Radical_Prostatectomy_Challenge/191091

Published
2023

8. Collisional flavor pendula and neutrino quantum thermodynamics

Author

Johns, Lucas and Rodriguez, Santiago

Subjects
High Energy Physics - Phenomenology, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Neutrinos in core-collapse supernovae and neutron-star mergers are susceptible to flavor instabilities of three kinds: slow, fast, and collisional. Prior work has established mappings of the first two onto abstract mechanical systems in flavor space, respectively named the slow and fast flavor pendula. Here we introduce and analyze the flavor pendulum associated with the third class. We explain our results in terms of the recently developed theory of neutrino quantum thermodynamics. Perhaps our most surprising finding is that there exists a limit in which decoherent interactions drive perfectly coherent flavor conversion., Comment: 10 pages, 4 figures

Published
2023

9. Elevated genetic risk for multiple sclerosis emerged in steppe pastoralist populations

Author

Barrie, William, Yang, Yaoling, Irving-Pease, Evan K, Attfield, Kathrine E, Scorrano, Gabriele, Jensen, Lise Torp, Armen, Angelos P, Dimopoulos, Evangelos Antonios, Stern, Aaron, Refoyo-Martinez, Alba, Pearson, Alice, Ramsøe, Abigail, Gaunitz, Charleen, Demeter, Fabrice, Jørkov, Marie Louise S, Møller, Stig Bermann, Springborg, Bente, Klassen, Lutz, Hyldgård, Inger Marie, Wickmann, Niels, Vinner, Lasse, Korneliussen, Thorfinn Sand, Allentoft, Morten E, Sikora, Martin, Kristiansen, Kristian, Rodriguez, Santiago, Nielsen, Rasmus, Iversen, Astrid KN, Lawson, Daniel J, Fugger, Lars, and Willerslev, Eske

Subjects
Biological Sciences, Genetics, History, Heritage and Archaeology, Archaeology, Historical Studies, Prevention, Multiple Sclerosis, Neurosciences, Human Genome, Genetic Testing, Neurodegenerative, Brain Disorders, Autoimmune Disease, 2.1 Biological and endogenous factors, Neurological, Inflammatory and immune system, Humans, Datasets as Topic, Diet, Europe, Genetic Predisposition to Disease, Genetics, Medical, Genome, Human, Grassland, History, 15th Century, History, Ancient, History, Medieval, Human Migration, Life Style, Neurodegenerative Diseases, Population Density, General Science & Technology
Abstract

Multiple sclerosis (MS) is a neuro-inflammatory and neurodegenerative disease that is most prevalent in Northern Europe. Although it is known that inherited risk for MS is located within or in close proximity to immune-related genes, it is unknown when, where and how this genetic risk originated1. Here, by using a large ancient genome dataset from the Mesolithic period to the Bronze Age2, along with new Medieval and post-Medieval genomes, we show that the genetic risk for MS rose among pastoralists from the Pontic steppe and was brought into Europe by the Yamnaya-related migration approximately 5,000 years ago. We further show that these MS-associated immunogenetic variants underwent positive selection both within the steppe population and later in Europe, probably driven by pathogenic challenges coinciding with changes in diet, lifestyle and population density. This study highlights the critical importance of the Neolithic period and Bronze Age as determinants of modern immune responses and their subsequent effect on the risk of developing MS in a changing environment.

Published
2024

10. MATIS: Masked-Attention Transformers for Surgical Instrument Segmentation

Author

Ayobi, Nicolás, Pérez-Rondón, Alejandra, Rodríguez, Santiago, and Arbeláez, Pablo

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

We propose Masked-Attention Transformers for Surgical Instrument Segmentation (MATIS), a two-stage, fully transformer-based method that leverages modern pixel-wise attention mechanisms for instrument segmentation. MATIS exploits the instance-level nature of the task by employing a masked attention module that generates and classifies a set of fine instrument region proposals. Our method incorporates long-term video-level information through video transformers to improve temporal consistency and enhance mask classification. We validate our approach in the two standard public benchmarks, Endovis 2017 and Endovis 2018. Our experiments demonstrate that MATIS' per-frame baseline outperforms previous state-of-the-art methods and that including our temporal consistency module boosts our model's performance further., Comment: ISBI 2023 (Oral). Winning method of the 2022 SAR-RARP50 Challenge (arXiv:2401.00496). Official extension published at arXiv:2401.11174 . Code available at https://github.com/BCV-Uniandes/MATIS

Published
2023
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11. Optimizing tip-surface interactions in ESR-STM experiments

Author

Rodríguez, Santiago A., Gómez, Sergio S., Fernández-Rossier, Joaquín, and Ferrón, Alejandro

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Electron-spin resonance carried out with scanning tunneling microscopes (ESR-STM) is a recently developed experimental technique that is attracting enormous interest on account of its potential to carry out single-spin on-surface resonance with subatomic resolution. Here we carry out a theoretical study of the role of tip-adatom interactions and provide guidelines for choosing the experimental parameters in order to optimize spin resonance measurements. We consider the case of the Fe adatom on a MgO surface and its interaction with the spin-polarized STM tip. We address three problems: first, how to optimize the tip-sample distance to cancel the effective magnetic field created by the tip on the surface spin, in order to carry out proper magnetic field sensing. Second, how to reduce the voltage dependence of the surface-spin resonant frequency, in order to minimize tip-induced decoherence due to voltage noise. Third, we propose an experimental protocol to infer the detuning angle between the applied field and the tip magnetization, which plays a crucial role in the modeling of the experimental results., Comment: 10 pages, 5 Figures

Published
2022
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12. Performance-Related Characterization of SBS-Modified Bitumen-Filler Mastics Incorporating Hydrated Lime

Author

Carvajal-Muñoz, Juan S., Airey, Gordon, Vergara, Isabela, Sanjuan, Anyely, Pérez, María, Contreras, María, Hernández, Rubén, Cepeda, Juan, Rodríguez, William, Gómez, Fabio, Rodriguez, Santiago, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Pereira, Paulo, editor, and Pais, Jorge, editor

Published
2024
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27. Women's Basketball and Gymnastics head into tough SEC play

Author

Rodriguez, Santiago

Subjects
Gymnastics
Abstract

Byline: Santiago Rodriguez The No. 5 LSU Lady Tigers will travel to South Carolina to face the No. 2 Gamecocks in an epic SEC battle. The Tigers are undefeated with [...]

Published
2025

30. Bryant and Finnegan finish off strong to secure win against Florida

Author

Rodriguez, Santiago

Subjects
News, opinion and commentary, Sports and fitness
Abstract

Byline: Santiago Rodriguez Friday Night. Packed PMAC. LSU vs. Florida. Olympians. An elite SEC Opener. In front of the third-largest crowd in program history, it came down to the last [...]

Published
2025

31. 'We had the urgency, physicality, and toughness,' McMahon on win against Arkansas

Author

Rodriguez, Santiago

Subjects
Basketball (College), News, opinion and commentary, Sports and fitness
Abstract

Byline: Santiago Rodriguez The LSU Men's Basketball Team defeated Arkansas to win their first game of SEC play. Coming from three straight loses, all in conference play, the Tigers managaed [...]

Published
2025

32. HIGHLIGHTS | LSU Men's Basketball vs Arkansas | 01.14.2025

Author

Rodriguez, Santiago

Subjects
News, opinion and commentary, Sports and fitness
Abstract

Byline: Santiago Rodriguez The LSU Men's Basketball Team faced Arkansas in the fourth game of SEC play. Coming from three straight loses, all in conference play, similar to Razorbacks who [...]

Published
2025

33. The Approved Live-Attenuated Chikungunya Virus Vaccine (IXCHIQ®) Elicits Cross-Neutralizing Antibody Breadth Extending to Multiple Arthritogenic Alphaviruses Similar to the Antibody Breadth Following Natural Infection

Author

Whitney C. Weber, Zachary J. Streblow, Craig N. Kreklywich, Michael Denton, Gauthami Sulgey, Magdalene M. Streblow, Dorca Marcano, Paola N. Flores, Rachel M. Rodriguez-Santiago, Luisa I. Alvarado, Vanessa Rivera-Amill, William B. Messer, Romana Hochreiter, Karin Kosulin, Katrin Dubischar, Vera Buerger, and Daniel N. Streblow

Subjects
chikungunya virus (CHIKV), alphaviruses, IXCHIQ, vaccine, cross-neutralization, antibody, Medicine
Abstract

The first vaccine against chikungunya virus (CHIKV) was recently licensed in the U.S., Europe, and Canada (brand IXCHIQ®, referred to as VLA1553). Other pathogenic alphaviruses co-circulate with CHIKV and major questions remain regarding the potential of IXCHIQ to confer cross-protection for populations that are exposed to them. Here, we characterized the cross-neutralizing antibody (nAb) responses against heterotypic CHIKV and additional arthritogenic alphaviruses in individuals at one month, six months, and one year post-IXCHIQ vaccination. We characterized nAbs against CHIKV strains LR2006, 181/25, and a 2021 isolate from Tocantins, Brazil, as well as O’nyong-nyong virus (ONNV), Mayaro virus (MAYV), and Ross River virus (RRV). IXCHIQ elicited 100% seroconversion to each virus, with the exception of RRV at 83.3% seroconversion of vaccinees, and cross-neutralizing antibody potency decreased with increasing genetic distance from CHIKV. We compared vaccinee responses to cross-nAbs elicited by natural CHIKV infection in individuals living in the endemic setting of Puerto Rico at 8–9 years post-infection. These data suggest that IXCHIQ efficiently and potently elicits cross-nAb breadth that extends to related alphaviruses in a manner similar to natural CHIKV infection, which may have important implications for individuals that are susceptible to alphavirus co-circulation in regions of potential vaccine rollout.

Published
2024
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34. Association between use of enhanced recovery after surgery protocols and postoperative complications after gastric surgery for cancer (POWER 4): a nationwide, prospective multicentre study

Author

Farré, Mercè Güell, Font, Roser Farré, del Gobbo, Rafael Diaz, Jimenez, Raquel Sánchez, Reche, Isabel Pérez, Calvo, Belen Gil, García, Jordi Llorca, Sánchez, Laura Carrasco, Llimargas, Cristina Prat, García-Sánchez, Ana María, Martínez-Ragüés, Gema, Gómez-Fernández, María, del-Castillo-Criado, Álvaro, Martínez-Díaz, Ruth, Alegría-Rebollo, Sara, Ferrerode-Paz, Javier, García-Pérez, Cristina, Marcos-Contreras, Sergio, Fernández-García, Diana, Torío-Marcos, Maeva, Fernández, Omar Abdellah, Parreño-Manchado, Felipe Carlos, Martín, María Ángeles, Tena-Guerrero, José María, Palma-González, Estefanía, Flores-Flores, Gustavo, Zugasti-Echarte, Orreaga, Pérez-Bergara, Elena, Hernández-García, Susana, Martín-Vizcaíno, Marta, Yoldi-Murillo, Francisco Javier, Valencia-Alzueta, Maider, Chaveli-Díaz, Carlos, Miranda-Murua, Coro, Yárnoz-Irazábal, Concepción, Botella-Martínez, Sonsoles, López-Pardo, Rafael, Torres-Montalvo, Marta, Pinilla-Pico, Isabel, del-Cojo-Peces, Enrique, del Pilar Rodríguez-Chaparro, María, Gómez-Ríos, Manuel Ángel, del-Río-Regueira, Sara, Mosquera-Rodríguez, Eva, Hernández-Beslmeisl, Jessica, Perozo-Medina, María Alejandra, Darias-Delbey, Beneharo, del Carmen Martín-Lorenzo, María, González-Fariña, Vanessa, Rodríguez-Domínguez, Montserrat, Fernández-de-la-Vega-Medina, Jaime, Berrotarán-Ayub, Pilar, Valín-Martínez, José, Concepción-Santana, Laura, Cruz-Zorio, Raúl, Betancort-Gutiérrez Rodríguez, Dolores, Gómez-Viana, Leticia, Figueiredo, Olalla, Rodríguez, Ariadna, González, Manuel, Iglesias, David, Domínguez-Carrera, José Manuel, Olmo, Jorgedo, Del-Río-Fernández, Sabela, Dos-Santos-Carregal, Laura, Rodríguez-Forja, María Jesús, Campaña-Figueira, Olga, Álvarez-Escudero, Julián, Lesquereux-Martínez, Lucía, Parada-González, Purificación, Montenegro-Romero, Ricardo, Bustamante-Montalvo, Manuel, García-Placín, Ana Rosa, Carpintero-Rama, Carmen, Brea-Bahamonde, Sergio, Torres-Alfonso, José Ramón, Barragán-Serrano, Cristina, Posada-González, María, Salcedo-Cabañas, Gabriel, Vor-wald-Wolfgang, Peter, Otero-Martínez, Isabel, Jove-Alborés, Patricia, López-Otero, Marta, Pardellas-Rivera, Hermelinda, Maruri-Chimeno, Ignacio, González-Fernández, Sonia, Sánchez-Santos, Raquel, Luna-Mendoza, Luis, Lloria-Pons, Enrique, Gramuntell-Marco, Francisco, Cánovas-de-Lucas, Raúl, Sancho-Moya, Cristina, Risco, Raquel, Fernández-Esmerats, Anna, Sanahuja-Blasco, Josep Martí, López-Baamonde, Manuel, Ubré, Marta, Martínez-Pallí, Graciela, Momblán, Dulce, Rivas-Gallardo, Nuria, Sánchez-Martín, Rubén, Moral, Pedro, Navarro, Rosalía, Santé, Luis, Almenta, Esther, Muñoz-Hernández, Henar, Rodríguez-Jiménez, Rita Pilar, Ruiz, Nuria, Peláez, María Teresa, Rojo, Juan José, Gordaliza, Carlota, Jezieniecki, Carlos, Jimenez-Viñas, Carlos, Brugiotti, Carlo, Onchalos-Lopez, Ulices, Llácer-Pérez, Manuel, Batalla, Astrid, Azparren, Gonzalo, Bastitta, Micaela, Cueva, Luisa, Felipe, Mar, Giné, Marta, Gómez, Ana M., India, Inmaculada, Piñol, Santiago, Gimeno-Campos, Maria José, Moreno-Gázquez, Aurora, Llorens-Herrerías, Julio, Del-Castillo-Rodrigo, Gema, Herrero-Bogajo, María Luz, De Miguel-Cabrera, María Isabel, España-Pamplona, José Miguel, Gellida-Vilarroig, María, Jordá-Sanz, Laura, Gil-Trujillo, Silvia, Calatayud-Gómez, Laura, Valencia-Echeverri, Juan David, Baladrón-González, Víctor, Gil-Rendo, Aurora, Sanchez-García, Susana, García-Santos, Esther, Benito, Carmen, Lisbona, Cristina, Benito, Pilar, Correa-Chacón, Olga Cecilia, Alcázar-Urrea, Alejandro, Fernández-López, Ana Belén, Betancourt-Bastidas, Ramiro, Navarro-García, Inmaculada, Romera-Barba, Elena, Mira-Jovells, Nuria, Estevez-Perez, Liz Karime, Saludes-Serra, Judit, Olona-Casas, Carles, Vadillo-Bargalló, Jordi, Jorba-Martín, Rosa, Mojarro, Irene, Lorente, Juan Victor, Longo-Guridi, Pablo, Quintero-Moreno, Ana Maria, Soriano-López, David, de la Peña Gómez-Dominguez, Maria, Prieto-Candau, Cecilia, Hernández-Castillo, Marisol, Jarana, Irene, García-Andreu, Francisco, González-González, Jose, Díaz-Lara, María Dolores, Añón-Iranzo, Elena, Aguiló-Lucia, Javier, Fernandez-Martin, Maria Teresa, Guerra, Yessica, Gimeno-Fernández, Pablo, Iglesias-Morales, Carla, Villalba, Ana María Ríos, Nespereira-García, Paula, Castro-Neira, María José, Ochoa-Díez, María, García-Orallo, Silvia, Mozo-Segurado, Maialen, Gutiérrez-Cabezas, Jose Manuel, Gonzalo-González, Ruben, García-Álvarez, Raquel, Ramiro-Ruíz, Álvaro, González-Cofrade, María, Carvajal-Revuelta, Estefanía, Bellido-López, Ana, Redondo-Cristóbal, Guillermo, Amoza-Pais, Sonia, Díaz-Vico, Tamara, Moreno-Gijón, María, Sanz-Navarro, Sandra, Sanz-Álvarez, Lourdes M, Turienzo-Santos, Estrella Olga, Rodicio-Miravalles, Jose Luis, Rizzo-Ramos, Amaya, Cuéllar-Martínez, Ana, Álvarez-Fernández, Rosa Ana, Fernández-Seijo, Carmen, Álvarez-Barrial, Amelia, Gónzalez-Ortea, Carmen, Fernández-Rodriguez, Silvia, García-González, Nerea, Varela-Rodriguez, Lorena, Berzal-Canga, Elena, García-Díaz-Negrete, Ángela, García-Sánchez, Helena, Saenz-Abos, Javier, Ayuso-Iñigo, Beatriz, Vega-Colón, María, Palacios-Córdoba, Ángela Catalina, Quel-Collado, María Teresa, Olvera-García, Mercedes, Martinez-Sánchez, Agustina, Serrano-Alvarez, Carmen, Ganuza-Martínez, Eunate, Maroño-Boedo, María Jesús, Sánchez-Campos, Alberto, Escontrela-Rodríguez, Blanca Anuncia, Martínez-Ruiz, Alberto, Errazti-Olartecoechea, Gaizka, Rodeño-Esteban, Iratxe, Moreno-Allende, Tamara, Gutierrez-Grijalba, Oihane, Katary-niuk-Di-Costanzo, Yanina, Alvarez-Abad, Irene, Sendino-Cañizares, Patricia, Mifsut-Porcel, Patricia, Sarriugarte-Lasarte, Aingeru, Guerra-Lerma, Mikel, Logroño-Ejea, Margarita, Iturricastillo-Pérez, María Del Carmen, Gastaca-Abasolo, María, Muñoz-Sanz, María José, Iriarte-Zaranton, Ibai, Olea-De-La-Fuente, Erika, Mendiguren-Murua, Ana, Reka-Mediavilla, Lorena, Gastón-Moreno, Alberto, Martínez-De-Aragón-Remirez-De-Esparza, Gabriel Jesús, Sierra-Esteban, Valentín, Montero-Mejías, Gema, Pardo-Martínez, Claudia, Valadés-Periañez, Teresa, Marín-Moreno, Ana, Caro-González, Juan Ricardo, Rodríguez-Pérez, María José, Herrero-Herrero, José Carlos, Renedo-Corcóstegui, Pablo, Martín-Oliva, Alejandro, Fernández-Herrero, Ana Isabel, Andrieu-Estefanía, Nerea, Albaladejo-Magdalena, Javier, Álvarez-Rodriguez, María, Sosa-Rodríguez, Valentina, Fresnedo-Pérez, Raquel María, Gil-Lapetra, Cristina, Bolzoni-Marciel, Beatriz, Herrera-López, Maria Isabel, Setién-Moreno, Fernando, Castro-Costoya, Ana Zulema, Olarra-Nuel, José, De-Vega-Irañeta, Marta, Ugarte-Sierra, Bakarne, Vicente-Rodríguez, Irune, Fernández-Pablos, Francisco Javier, Abad-Alonso, Rafael Alberto, Maniega-Alba, Roberto, Ibáñez-Aguirre, Francisco Javier, Postigo-Morales, Susana, Intxaurraga-Fernández, Karmelo, Telletxea-Benguria, Sorkunde, Outón-Guerrero, Ángela, Acosta-Mérida, María Asunción, de la Plaza-Llamas, Roberto, García-Gil, José Manuel, Gemio-del-Rey, Ignacio Antonio, Cabellos-Olivares, Mercedes, Fernández-García, Raquel, Freitas, Lidia Castro, Alcorta, Beatriz Nacarino, Ayuso, María Martín, González, María Moral, Teruel, David García, Serrat-Puyol, Jordi, Molinas-Bruguera, Joan, Fernández, Sara, Peris-Tomás, Nuria, Díez-Ares, Jose Ángel, Periáñez-Gómez, Dolores, Gonzálvez-Guardiola, Paula, Trullenque-Juan, Ramón, Martínez-Mas, Ezequiel, Martínez, Estefanía, Martín, Julia, Higueras, Raquel, Cuenca, Sara, Martín-Vaquerizo, Beatriz, Espinosa-Moreno, Alma M., Sánchez-Merchante, Miriam, Alcañiz-Sobrino, Rebeca, Egea-Hita, Guillermo, García-del-Valle-y-Manzano, Santiago, Moreno-Blanco, Virginia, Bruna-Esteban, Marcos, Mingol-Navarro, Fernando, Vaqué-Urbaneja, Javier, Díaz-Cambronero, Óscar, Luján-Sandemetrio, Beatriz, Copariate-Piqueras, Bisila, Giménez-Salcedo, Sonia, Ripolles-Melchor, Javier, Abad-Motos, Ane, Abad-Gurumeta, Alfredo, Aracil-Escoda, Norma, Saez-Ruiz, Elena, Salva-chua-Fernandez, Rut, Paseiro-Crespo, Gloria, García-Nebreda, María, Toribio, Begoña, Ferrero-Celemin, Esther, García-Sancho-Téllez, Luis, Sánchez-López, José Daniel, Núñez O'Sullivan, Sara, Gar-cía-Virosta, Mariana, Rodriguez-Haro, Carmen, Hernández-O’Reilly, María, Suarez-de-la-Rica, Alejandro, Lopez-Martinez, Mercedes, Croes, Bryant, Mujica, Jaime, Maseda, Emilio, Alday-Muñoz, Enrique, Mata-Mena, Esperanza, García-Sanz, Iñigo, Marín, Cristina, Muñoz, Antonio Pedraza, Dominguez, Jorge Puertas, González-López, Rocío, Navarro-Quirós, Gisela, Pérez-Moreiras, M. Isabel, Conde-Rodriguez, María, Muinelo-Lorenzo, Manuel, Díez-Zapirain, Miren Jasone, Tejón-Pérez, Guillermo, Álvarez-Cebrián, María Asunción, Barrero-Ruiz, Eva, Capa-Fuertes, Eva, Carrillo-Rivas, Mariana, Hernandez-Sanchez, Isabel, Monteagudo-Cimiano, Valvanuz, Pascual-Casado, Ángela, Rábago-Morillón, Jose Luis, Martinez-Ubieto, Javier, Pascual-Bellosta, Ana, Ortega-Lucea, Sonia, Perez-Otal, Berta, Tardos-Ascaso, Lucia, Ligorred-Padilla, Luis Antonio, Tur-Martínez, Jaume, Rodríguez-Santiago, Joaquin, Pérez-Romero, Noelia, Puértolas-Rico, Noelia, Hernández-Giménez, Laura, Concepción-Martín, Vanessa, Molnar, Viktoria, Barbero, Macarena, San-Antonio, Belén, Pueyo, Alberto, Mayo-Ossorio, M de los Angeles, Bengoechea-Trujillo, Ander, Pacheco-Garcia, José Manuel, Diez-Remesal, Yolanda, Gonzalo-Millán, Alba, Berruezo-Camacho, Alberto, Alaez-Cortés, Azucena, Ortolá-Rocher, Begoña, Iglesias-Gallego, Berta, Martín-Montero, Eduardo, Arias-Cuesta, Gerardo, de la Hoz-Polo, Inés, Recuero-Torrijos, Isabel, Pereira-Torres, Lucia, Cañamas-Catalá, Maria, Martin-González, Maria C., Zambrana-García, Paloma, Llorente-Damas, Sergio, Aldecoa, Cesar, Perez-Gonzalez, Alba, Bolaño-Perez, Clara, Velasco-Andres, Delia, Aguado-Saster, Esther, Arranz, Irene, Mendez-Torrubiano, Itziar, Vaquero-Perez, Laura, Sanz-de-Leon, Maria Jesus, Rodicio, Pablo, Martin-Alfonso, Silvia, Martin-Tappi, David, Madrid-Tribano, Mario, Rioja-Garrido, Rocio, Morales-Jaquete, Borja, Vicente-Orgaz, Marta, Orozco-Vinasco, Adriana Carolina, Fraga-Casais, Gema, Miyagi-Yonamine, Any Minerva, Ramos-de-Castro, Raquel, Mejía-Arnaud, Rossel Alina, Saz-Castro, Rubén, Díaz-Peña, Patricia, Camps-Cervantes, Angels, Tormos-Perez, M Pilar, Galan-Menendez, Patricia, Esclapez-Sampere, Elena, Villarino-Villa, Laura, Loaiza-Aldeán, Yuri, Chocron-Dapratt, Ivette, Martinez-Silva, Olga, Matarin-Olmo, Silvia, Berges-Gutiérrez, Héctor, Pérez-Serrano, Macarena, Diaz-Castillo, Juan Javier, Sancho-Muñoz-de-Verger, Álvaro, Villanueva-Mena-Bernal, Jesús Alejandro, Gil-Gómez, Maria Lucia, Fernanz-Anton, Jesús, Marmaña-Mezquita, Sandra, Galofré-Pujol, Gonzalo, Jericó, Carlos, Motos-Micó, José Jacob, Orts-Micó, Francisco José, Serra-Díaz, Carlos, Arlandis-Félix, Francisco, Pérez-Climent, Nieves, Blanes-Pastor, Lorena, Jover-Pinillos, Jose Luis, Salvaterra, David, Linero, Manuel, Galipienzo, Javier, Alonso, Óscar, Ortega, Gloria, Gonzalez, Santiago, Lopez-Rojo, Irene, Ripollés-Melchor, Javier, Abdel-lah Fernández, Omar, Tormos-Pérez, María P., A Mayo-Ossorio, María, Gil-Gómez, Lucia, Parreño-Manchado, Felipe C, De-Miguel-Cabrera, María I, García-Erce, José A., Río-Fernández, Sabela del, Herrero-Bogajo, María L., Zorrilla-Vaca, Andrés, Vaquero-Pérez, Laura, Fernández-Martín, María T., Ferrando-Ortolà, Carlos, Ramírez-Rodríguez, José M., and Aldecoa, César

Published
2023
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38. Single spin resonance driven by electric modulation of the g factor anisotropy

Author

Ferrón, Alejandro, Rodríguez, Santiago A., Gómez, Sergio S., Lado, Jose L., and Fernández-Rossier, Joaquín

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We address the problem of electronic and nuclear spin resonance of an individual atom on a surface driven by a scanning tunnelling microscope. Several mechanisms have been proposed so far, some of them based on the modulation of exchange and crystal field associated to a piezoelectric displacement of the adatom driven by the RF tip electric field. Here we consider a new mechanism, where the piezoelectric displacement modulates the g factor anisotropy, leading both to electronic and nuclear spin flip transitions. We discuss thoroughly the cases of Ti-H (S = 1/2) and Fe (S = 2) on MgO, relevant for recent experiments. We model the system using two approaches. First, an analytical model that includes crystal field, spin orbit coupling and hyperfine interactions. Second, we carry out density functional based calculations. We find that the modulation of the anisotropy of the g tensor due to the piezoelectric displacement of the atom is an additional mechanism for STM based single spin resonance, that would be effective in S = 1/2 adatoms with large spin orbit coupling. In the case of Ti-H on MgO, we predict a modulation spin resonance frequency driven by the DC electric field of the tip., Comment: 15 pages, 7 figures

Published
2019
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42. Congestive Cardiac Hepatopathy

Author

Téllez, Luis, Rodríguez-Santiago, Enrique, del Cerro, María Jesús, Albillos, Agustín, Valla, Dominique, editor, Garcia-Pagan, Juan Carlos, editor, De Gottardi, Andrea, editor, and Rautou, Pierre-Emmanuel, editor

Published
2022
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