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27 p, 986.9 KB |
Magnetism, spin dynamics, and quantum transport in two-dimensional systems
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Savero Torres, Williams (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) ;
García, José Hugo (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
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7 p, 2.2 MB |
Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
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Vila Tusell, Marc (Institut Català de Nanociència i Nanotecnologia) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ;
Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia) ;
Groth, Christoph W. (Université Grenoble Alpes) ;
Waintal, Xavier (Université Grenoble Alpes) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Improved fabrication techniques have enabled the possibility of ballistic transport and unprecedented spin manipulation in ultraclean graphene devices. Spin transport in graphene is typically probed in a nonlocal spin valve and is analyzed using spin diffusion theory, but this theory is not necessarily applicable when charge transport becomes ballistic or when the spin diffusion length is exceptionally long. [...]
2020 - 10.1103/PhysRevLett.124.196602
Physical review letters, Vol. 124, Issue 19 (May 2020) , art. 196602
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13 p, 895.2 KB |
Charge and spin transport anisotropy in nanopatterned graphene
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Gregersen, Søren Schou (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Jauho, Antti-Pekka (Danmarks Tekniske Universitet. Center for Nanostructured Graphene) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Power, Stephen R. (Institut Català de Nanociència i Nanotecnologia)
Anisotropic electronic transport is a possible route towards nanoscale circuitry design, particularly in two-dimensional materials. Proposals to introduce such a feature in patterned graphene have to date relied on large-scale structural inhomogeneities. [...]
2018 - 10.1088/2515-7639/aadca3
Journal of physics: Materials, Vol. 1, Núm. 1 (September 2018) , art. 015005
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15 p, 1.7 MB |
Deciphering the origin of nonlocal resistance in multiterminal graphene on hexagonal-boron-nitride with ab initio quantum transport : fermi surface edge currents rather than Fermi sea topological valley currents
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Marmolejo Tejada, J.M. (University of Delaware. Department of Physics and Astronomy) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Petrović, M. D. (University of Delaware. Department of Mathematical Sciences) ;
Chang, P-H (University of Nebraska Lincoln. Department of Physics and Astronomy) ;
Sheng, X-L (University of Delaware. Department of Mathematical Sciences) ;
Cresti, Alessandro (Université Grenoble Alpes) ;
Plecháč, P. (University of Delaware. Department of Mathematical Sciences) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Nikolić, B.K. (University of Delaware. Department of Physics and Astronomy)
The recent observation (Gorbachev et al 2014 Science 346 448) of nonlocal resistance R NL near the Dirac point (DP) of multiterminal graphene on aligned hexagonal-boron nitride (G/hBN) has been interpreted as the consequence of topological valley Hall currents carried by the Fermi sea states just beneath the bulk gap E g induced by inversion symmetry breaking. [...]
2018 - 10.1088/2515-7639/aad585
Journal of physics: Materials, Vol. 1, Núm. 1 (September 2018) , art. 015006
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8 p, 1.1 MB |
Shubnikov-de Haas oscillations in the anomalous Hall conductivity of Chern insulators
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Canonico, Luis M. (Universidade Federal Fluminense) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Rappoport, Tatiana G. (Universidade Federal Do Rio de Janeiro) ;
Ferreira, Aires (York University. Department of Physics) ;
Muniz, R. B. (Universidade Federal Fluminense)
The Haldane model on a honeycomb lattice is a paradigmatic example of a system featuring quantized Hall conductivity in the absence of an external magnetic field, that is, a quantum anomalous Hall effect. [...]
2018 - 10.1103/PhysRevB.98.085409
Physical review B, Vol. 98, Issue 8 (August 2018) , art. 85409
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17 p, 7.7 MB |
Spin transport in graphene/transition metal dichalcogenide heterostructures
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Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Vila Tusell, Marc (Institut Català de Nanociència i Nanotecnologia) ;
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Since its discovery, graphene has been a promising material for spintronics: its low spin-orbit coupling, negligible hyperfine interaction, and high electron mobility are obvious advantages for transporting spin information over long distances. [...]
2018 - 10.1039/c7cs00864c
Chemical Society Reviews, Vol. 47, Issue 9 (May 2018) , p. 3359-3379
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7.
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35 p, 1.3 MB |
Room-temperature spin hall effect in graphene/MoS2 van der Waals heterostructures
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Safeer, C.K. (CIC NanoGUNE) ;
Ingla-Aynés, Josep (CIC NanoGUNE) ;
Herling, Franz (CIC NanoGUNE) ;
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
Vila Tusell, Marc (Institut Català de Nanociència i Nanotecnologia) ;
Ontoso, Nerea (CIC NanoGUNE) ;
Calvo, M. Reyes (IKERBASQUE. Basque Foundation for Science) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Hueso, Luis E. (IKERBASQUE. Basque Foundation for Science) ;
Casanova, Fèlix (IKERBASQUE. Basque Foundation for Science)
Graphene is an excellent material for long-distance spin transport but allows little spin manipulation. Transition-metal dichalcogenides imprint their strong spin-orbit coupling into graphene via the proximity effect, and it has been predicted that efficient spin-to-charge conversion due to spin Hall and Rashba-Edelstein effects could be achieved. [...]
2019 - 10.1021/acs.nanolett.8b04368
Nano letters, Vol. 19, Issue 2 (February 2019) , p. 1074-1082
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