Resultados globales: 78 registros encontrados en 0.02 segundos.
Artículos, Encontrados 75 registros
Documentos de investigación, Encontrados 3 registros
Artículos Encontrados 75 registros  1 - 10siguientefinal  ir al registro:
1.
13 p, 3.8 MB Observation of giant and tunable thermal diffusivity of a Dirac fluid at room temperature / Block, Alexander (Institut Català de Nanociència i Nanotecnologia) ; Principi, Alessandro (University of Manchester. School of Physics and Astronomy) ; Hesp, Niels C. H. (Institut de Ciències Fotòniques) ; Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ; Liebel, Matz (Institut de Ciències Fotòniques) ; Watanabe, Kenji (National Institute for Materials Science. Research Center for Functional Materials (Tsukuba, Japó)) ; Taniguchi, Takashi (National Institute for Materials Science. International Center for Materials Nanoarchitectonics (Tsukuba, Japó)) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Koppens, Frank (Institució Catalana de Recerca i Estudis Avançats) ; van Hulst, Niek F. (Institut de Ciències Fotòniques) ; Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Conducting materials typically exhibit either diffusive or ballistic charge transport. When electron-electron interactions dominate, a hydrodynamic regime with viscous charge flow emerges -. More stringent conditions eventually yield a quantum-critical Dirac-fluid regime, where electronic heat can flow more efficiently than charge -. [...]
2021 - 10.1038/s41565-021-00957-6
Nature Nanotechnology, Vol. 16 (Nov. 2021) , p. 1195-1200  
2.
11 p, 2.1 MB Efficient machine-learning based interatomic potentialsfor exploring thermal conductivity in two-dimensional materials / Mortazavi, Bohayra (Leibniz Universität Hannover. Institute of Continuum Mechanics) ; Podryabinkin, Evgeny V. (Skolkovo Innovation Center. Skolkovo Institute of Science and Technology) ; Novikov, Ivan S. (Skolkovo Innovation Center. Skolkovo Institute of Science and Technology) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Rabczuk, Timon (Tongji University. Department of Geotechnical Engineering) ; Zhuang, Xiaoying (Leibniz Universität Hannover. Institute of Continuum Mechanics) ; Shapeev, Alexander V. (Skolkovo Innovation Center. Skolkovo Institute of Science and Technology)
It is well-known that the calculation of thermal conductivity using classical molecular dynamics (MD) simulations strongly depends on the choice of the appropriate interatomic potentials. As proven for the case of graphene, while most of the available interatomic potentials estimate the structural and elastic constants with high accuracy, when employed to predict the lattice thermal conductivity they however lead to a variation of predictions by one order of magnitude. [...]
2020 - 10.1088/2515-7639/ab7cbb
JPhys materials, Vol. 3, Issue 2 (April 2020) , art. 2LT02  
3.
13 p, 1.6 MB Impact of oxidation morphology on reduced graphene oxides upon thermal annealing / Antidormi, Aleandro (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Colombo, Luciano (Università di Cagliari. Dipartimento di Fisica)
Thermal reduction of graphene oxide (GO) is an essential technique to produce low-cost and higher quality graphene-based materials and composites used today in a plethora of applications. However, despite a demonstrated efficiency of high-temperature annealing in reducing the oxygen content of GO, the impact of the morphology of the initially oxidized samples on the restored sp graphene plane versus remaining sp imperfections remains unclear and out-of-control. [...]
2020 - 10.1088/2515-7639/ab5ef2
JPhys materials, Vol. 3, Issue 1 (January 2020) , art. 15011  
4.
15 p, 1.5 MB Room-temperature tunnel magnetoresistance across biomolecular tunnel junctions based on ferritin / Karuppannan, Senthil kumar (National University of Singapore. Department of Chemistry) ; Pasula, Rupali Reddy (Nanyang Technological University. School of Chemical and Biomedical Engineering) ; Herng, Tun Seng (National University of Singapore. Department of Materials Science and Engineering) ; Ding, Jun (National University of Singapore. Department of Materials Science and Engineering) ; Chi, Xiao (Singapore Synchrotron Light Source) ; Del Barco, Enrique (University of Central Florida. Department of Physics) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Yu, Xiaojiang (Singapore Synchrotron Light Source) ; Yakovlev, Nikolai (Institute of Materials Research and Engineering (Singapur, Singapur)) ; Lim, Sierin (Nanyang Technological University. School of Chemical and Biomedical Engineering) ; Nijhuis, Christian A. (University of Twente. Department of Molecules and Materials)
We report exceptionally large tunnel magnetoresistance (TMR) for biomolecular tunnel junctions based on ferritins immobilized between Ni and EGaIn electrodes. Ferritin stores iron in the form of ferrihydrite nanoparticles (NPs) and fulfills the following roles: (a) it dictates the tunnel barrier, (b) it magnetically decouples the NPs from the ferromagnetic (FM) electrode, (c) it stabilizes the NPs, and (d) it acts as a spin filter reducing the complexity of the tunnel junctions since only one FM electrode is required. [...]
2021 - 10.1088/2515-7639/abfa79
JPhys materials, Vol. 4, issue 3 (April 2021) , art. 035003  
5.
69 p, 4.2 MB Linear scaling quantum transport methodologies / Fan, Zheyong (Bohai University. School of Mathematics and Physics) ; Garcia, José H (Institut Català de Nanociència i Nanotecnologia) ; Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ; Barrios Vargas, José Eduardo (Universidad Nacional Autónoma de México. Departamento de Física y Química Teórica) ; Panhans, Michel (Technische Universität Dresden. Center for Advancing Electronics) ; Harju, Ari (Varian Medical Systems Finland) ; Ortmann, Frank (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
In recent years, predictive computational modeling has become a cornerstone for the study of fundamental electronic, optical, and thermal properties in complex forms of condensed matter, including Dirac and topological materials. [...]
2021 - 10.1016/j.physrep.2020.12.001
Physics Reports, Vol. 903 (April 2021) , p. 1-69  
6.
9 p, 494.7 KB Gate-tunable atomically thin lateral MoS2 Schottky junction patterned by electron beam / Katagiri, Y. (Aoyama Gakuin University. Department of Electrical Engineering and Electronics) ; Nakamura, T. (University of Tokyo. Institute for Solid State Physics) ; Ishii, A. (Aoyama Gakuin University. Department of Chemistry and Biological Science) ; Ohata, C. (Aoyama Gakuin University. Department of Electrical Engineering and Electronics) ; Hasegawa, M. (Aoyama Gakuin University. Department of Chemistry and Biological Science) ; Katsumoto, S. (University of Tokyo. Institute for Solid State Physics) ; Cusati, T. (Università di Pisa. Dipartimento di Ingegneria dell'Informazione) ; Fortunelli, A. (Istituto di Chimica dei Composti Organometallici (Pisa, Itàlia)) ; Iannaccone, G. (Università di Pisa. Dipartimento di Ingegneria dell'Informazione) ; Fiori, G. (Università di Pisa. Dipartimento di Ingegneria dell'Informazione) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Haruyama, J. (Aoyama Gakuin University. Department of Electrical Engineering and Electronics)
Among atomically thin two-dimensional (2D) materials, molybdenum disulfide (MoS) is attracting considerable attention because of its direct bandgap in the 2H-semiconducting phase. On the other hand, a 1T-metallic phase has been revealed, bringing complementary application. [...]
2016 - 10.1021/acs.nanolett.6b01186
Nano letters, Vol. 16, issue 6 (June 2016) , p. 3788-3794  
7.
14 p, 1.4 MB Machine-learning interatomic potentials enable first-principles multiscale modeling of lattice thermal conductivity in graphene/borophene heterostructures / Mortazavi, Bohayra (Leibniz Universität Hannover. Department of Mathematics and Physics) ; Podryabinkin, Evgeny V. (Skolkovo Innovation Center) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Rabczuk, Timon (Tongji University. Department of Geotechnical Engineering) ; Zhuang, Xiaoying (Leibniz Universität Hannover. Department of Mathematics and Physics) ; Shapeev, Alexander V. (Skolkovo Institute of Science and Technology)
One of the ultimate goals of computational modeling in condensed matter is to be able to accurately compute materials properties with minimal empirical information. First-principles approaches such as density functional theory (DFT) provide the best possible accuracy on electronic properties but they are limited to systems up to a few hundreds, or at most thousands of atoms. [...]
2020 - 10.1039/d0mh00787k
Materials Horizons, Vol. 7, issue 9 (2020) , p. 2359-2367  
8.
18 p, 1.5 MB Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures / Benítez, L. Antonio (Institut Català de Nanociència i Nanotecnologia) ; Savero Torres, Williams Fernando (Institut Català de Nanociència i Nanotecnologia) ; Sierra, Juan F. (Institut Català de Nanociència i Nanotecnologia) ; Timmermans, Matias (Institut Català de Nanociència i Nanotecnologia) ; Garcia, José H (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Costache, Marius Vasile (Institut Català de Nanociència i Nanotecnologia) ; Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia)
Spin-orbit coupling stands as a powerful tool to interconvert charge and spin currents and to manipulate the magnetization of magnetic materials through spin-torque phenomena. However, despite the diversity of existing bulk materials and the recent advent of interfacial and low-dimensional effects, control of this interconversion at room temperature remains elusive. [...]
2020 - 10.1038/s41563-019-0575-1
Nature materials, Vol. 19, issue 2 (Feb. 2020) , p. 170-175  
9.
27 p, 986.9 KB Magnetism, spin dynamics, and quantum transport in two-dimensional systems / Savero Torres, Williams Fernando (Institut Català de Nanociència i Nanotecnologia) ; Sierra, Juan F. (Institut Català de Nanociència i Nanotecnologia) ; Benítez, L. Antonio (Institut Català de Nanociència i Nanotecnologia) ; Bonell, Frédéric (Université Grenoble-Alpes) ; Garcia, José H (Institut Català de Nanociència i Nanotecnologia) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ; Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia)
Two-dimensional (2D) quantum materials offer a unique platform to explore mesoscopic phenomena driven by interfacial and topological effects. Their tunable electric properties and bidimensional nature enable their integration into sophisticated heterostructures with engineered properties, resulting in the emergence of new exotic phenomena not accessible in other platforms. [...]
2020 - 10.1557/mrs.2020.121
MRS Bulletin, Vol. 45, issue 5 (May 2020) , p. 357-365  
10.
13 p, 342.2 KB Optimization of the sensitivity of a double-dot magnetic detector / Macucci, Massimo (Università di Pisa. Dipartimento di Ingegneria dell'Informazione) ; Marconcini, Paolo (Università di Pisa. Dipartimento di Ingegneria dell'Informazione) ; Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We investigate, by means of numerical simulations, the lowest magnetic field level that can be detected with a given relative accuracy with a sensor based on a double-dot device fabricated in a high-mobility two-dimensional electron gas. [...]
2020 - 10.3390/electronics9071134
Electronics, Vol. 9, issue 7 (July 2020) , art. 1134  

Artículos : Encontrados 75 registros   1 - 10siguientefinal  ir al registro:
Documentos de investigación Encontrados 3 registros  
1.
139 p, 7.1 MB Spin-orbit coupling in graphene/transition metal dichalcogenides devices / Benítez, L. Antonio ; Valenzuela, Sergio Osvaldo, dir. ; Roche, Stephan Jean Louis, dir. ; Costache, Marius Vasile, dir. ; Mompart Penina, Jordi, dir.
Aquest treball s'emmarca dins els camps de l'espintrònica i la spin-orbitrònica, l'objectiu final del qual és controlar el grau de llibertat de l'espín de l'electró mitjançant l'acoblament spin-òrbita (SOC) en sistemes d'estat sòlid. [...]
El presente trabajo se encuentra dentro de los campos de la espintrónica y la espín-orbitrónica, cuyo objetivo final es controlar el grado de libertad de espín del electrón mediante el acoplamiento espín-órbita (SOC) en sistemas de estado sólido. [...]
The presented work is within the fields of spintronics and spin-orbitronics, whose final aim is to control the electron's spin degree of freedom via the spin-orbit coupling (SOC) in solid-state systems. [...]

2020  
2.
201 p, 31.4 MB Theoretical Study of Spin Dynamics in Two-Dimensional Quantum Materials / Vila Tusell, Marc ; Roche, Stephan Jean Louis, dir. ; Cummings, Aron, dir. ; Valenzuela, Sergio Osvaldo, dir. ; Navau Ros, Carles, dir.
El camp de l'espintrònica té l'objectiu d'utilitzar el grau de llibertat d'espín de l'electró per emmagatzemar, transportar i manipular informació en dispositius electrònics de nova generació. [...]
El campo de la espintrónica tiene como objetivo utilizar el grado de libertad de espín para almacenar, transportar y manipular información en dispositivos electrónicos de próxima generación. En esta tesis, utilizo metodologías de transporte cuántico para simular la dinámica de espín en dispositivos hechos de materiales bidimensionales. [...]
The field of spintronics aims at using the spin degree of freedom to store, transport and manipulate information in next-generation electronic devices. In this thesis, I use quantum transport methodologies to simulate spin dynamics in devices made of two-dimensional materials. [...]

2020  
3.
228 p, 4.6 MB Charge and Spin Transport in Disordered Graphene-Based Materials / Dinh, Van Tuan ; Roche, Stephan, dir. ; Pascual, Jordi ; Universitat Autònoma de Barcelona. Departament de Física
Esta tesis está enfocada en la modelización y simulación del transporte de carga y spin en materiales bidimensionales basados en Grafeno, así como en el impacto de la policristalinidad en el rendimiento de transistores de efecto campo diseñados con este tipo de materiales. [...]
This thesis is focused on modeling and simulation of charge and spin transport in two dimensional graphene-based materials as well as the impact of graphene polycrystallinity on the performance of graphene field-effect transistors. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2014  

Vea también: autores con nombres similares
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