Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport

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 necessar...

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Autores: Vila Tusell, Marc|||0000-0001-9118-421X, Garcia, José H.|||0000-0002-5752-4759, Cummings, Aron|||0000-0003-2307-497X, Power, Stephen|||0000-0003-4566-628X, Groth, Christoph W., Waintal, Xavier|||0000-0003-3816-8290, Roche, Stephan|||0000-0003-0323-4665
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:230698
Acceso en línea:https://ddd.uab.cat/record/230698
https://dx.doi.org/urn:doi:10.1103/PhysRevLett.124.196602
Access Level:acceso abierto
Palabra clave:Ballistic transports
Fabrication technique
Nonlocal spin valves
Quantum simulations
Spin manipulation
Spin-diffusion length
Theoretical framework
Two-dimensional materials
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spelling Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic TransportVila Tusell, Marc|||0000-0001-9118-421XGarcia, José H.|||0000-0002-5752-4759Cummings, Aron|||0000-0003-2307-497XPower, Stephen|||0000-0003-4566-628XGroth, Christoph W.Waintal, Xavier|||0000-0003-3816-8290Roche, Stephan|||0000-0003-0323-4665Ballistic transportsFabrication techniqueNonlocal spin valvesQuantum simulationsSpin manipulationSpin-diffusion lengthTheoretical frameworkTwo-dimensional materialsImproved 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. Here, we study these regimes by performing quantum simulations of graphene nonlocal spin valves. We find that conventional spin diffusion theory fails to capture the crossover to the ballistic regime as well as the limit of long spin diffusion length. We show that the latter can be described by an extension of the current theoretical framework. Finally, by covering the whole range of spin dynamics, our study opens a new perspective to predict and scrutinize spin transport in graphene and other two-dimensional material-based ultraclean devices. 22020-01-0120202020-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/230698https://dx.doi.org/urn:doi:10.1103/PhysRevLett.124.196602reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 785219Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2017-0706open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2306982026-06-06T12:50:31Z
dc.title.none.fl_str_mv Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
title Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
spellingShingle Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
Vila Tusell, Marc|||0000-0001-9118-421X
Ballistic transports
Fabrication technique
Nonlocal spin valves
Quantum simulations
Spin manipulation
Spin-diffusion length
Theoretical framework
Two-dimensional materials
title_short Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
title_full Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
title_fullStr Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
title_full_unstemmed Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
title_sort Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
dc.creator.none.fl_str_mv Vila Tusell, Marc|||0000-0001-9118-421X
Garcia, José H.|||0000-0002-5752-4759
Cummings, Aron|||0000-0003-2307-497X
Power, Stephen|||0000-0003-4566-628X
Groth, Christoph W.
Waintal, Xavier|||0000-0003-3816-8290
Roche, Stephan|||0000-0003-0323-4665
author Vila Tusell, Marc|||0000-0001-9118-421X
author_facet Vila Tusell, Marc|||0000-0001-9118-421X
Garcia, José H.|||0000-0002-5752-4759
Cummings, Aron|||0000-0003-2307-497X
Power, Stephen|||0000-0003-4566-628X
Groth, Christoph W.
Waintal, Xavier|||0000-0003-3816-8290
Roche, Stephan|||0000-0003-0323-4665
author_role author
author2 Garcia, José H.|||0000-0002-5752-4759
Cummings, Aron|||0000-0003-2307-497X
Power, Stephen|||0000-0003-4566-628X
Groth, Christoph W.
Waintal, Xavier|||0000-0003-3816-8290
Roche, Stephan|||0000-0003-0323-4665
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ballistic transports
Fabrication technique
Nonlocal spin valves
Quantum simulations
Spin manipulation
Spin-diffusion length
Theoretical framework
Two-dimensional materials
topic Ballistic transports
Fabrication technique
Nonlocal spin valves
Quantum simulations
Spin manipulation
Spin-diffusion length
Theoretical framework
Two-dimensional materials
description 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. Here, we study these regimes by performing quantum simulations of graphene nonlocal spin valves. We find that conventional spin diffusion theory fails to capture the crossover to the ballistic regime as well as the limit of long spin diffusion length. We show that the latter can be described by an extension of the current theoretical framework. Finally, by covering the whole range of spin dynamics, our study opens a new perspective to predict and scrutinize spin transport in graphene and other two-dimensional material-based ultraclean devices.
publishDate 2020
dc.date.none.fl_str_mv 2
2020-01-01
2020
2020-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/230698
https://dx.doi.org/urn:doi:10.1103/PhysRevLett.124.196602
url https://ddd.uab.cat/record/230698
https://dx.doi.org/urn:doi:10.1103/PhysRevLett.124.196602
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 785219
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2017-0706
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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