Graphene spintronics

This article presents the current puzzling controversy between theory and experimental results concerning the mechanisms leading to spin relaxation in graphene-based materials. On the experimental side, it is surprising that regardless of the quality of the graphene monolayer, which is characterized...

Descripción completa

Detalles Bibliográficos
Autores: Roche, Stephan|||0000-0003-0323-4665, Valenzuela, Sergio O.|||0000-0002-4632-8891
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:232117
Acceso en línea:https://ddd.uab.cat/record/232117
https://dx.doi.org/urn:doi:10.1088/0022-3727/47/9/094011
Access Level:acceso abierto
id ES_b0690a77ad9a6f3dcb2e8afffd7a08ef
oai_identifier_str oai:ddd.uab.cat:232117
network_acronym_str ES
network_name_str España
repository_id_str
spelling Graphene spintronicspuzzling controversies and challenges for spin manipulationRoche, Stephan|||0000-0003-0323-4665Valenzuela, Sergio O.|||0000-0002-4632-8891This article presents the current puzzling controversy between theory and experimental results concerning the mechanisms leading to spin relaxation in graphene-based materials. On the experimental side, it is surprising that regardless of the quality of the graphene monolayer, which is characterized by the carrier mobility, the typical Hanle precession measurements yield spin diffusion times in the order of which is several orders of magnitude below the theoretical estimates based on the expected low intrinsic spin-orbit coupling in graphene. The results are weakly dependent on whether graphene is deposited or boron-nitride substrates or is suspended, with the mobility spanning 3 orders of magnitude. On the other hand, extraction form two-terminal magnetoresistance measurements, accounting for contact effects results in 0.1 s, and corresponding diffusion lengths of about 100 m up to room temperature. Such discrepancy jeopardizes further progress towards spin manipulation on a lateral graphene two-dimensional platform. After a presentation of basic concepts, we here discuss state-of-the-art literature and the limits of all known approaches to describe spin transport in massless-Dirac fermions, in which the effects of strong local spin-orbit coupling ceases to be accessible with perturbative approaches. We focus on the limits of conventional views of spin transport in graphene and offer novel perspectives for further progress. 22014-01-0120142014-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/232117https://dx.doi.org/urn:doi:10.1088/0022-3727/47/9/094011reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Ciencia e Innovación https://doi.org/10.13039/501100004837 MAT2010-18065Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2012-33911open 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:2321172026-06-06T12:50:31Z
dc.title.none.fl_str_mv Graphene spintronics
puzzling controversies and challenges for spin manipulation
title Graphene spintronics
spellingShingle Graphene spintronics
Roche, Stephan|||0000-0003-0323-4665
title_short Graphene spintronics
title_full Graphene spintronics
title_fullStr Graphene spintronics
title_full_unstemmed Graphene spintronics
title_sort Graphene spintronics
dc.creator.none.fl_str_mv Roche, Stephan|||0000-0003-0323-4665
Valenzuela, Sergio O.|||0000-0002-4632-8891
author Roche, Stephan|||0000-0003-0323-4665
author_facet Roche, Stephan|||0000-0003-0323-4665
Valenzuela, Sergio O.|||0000-0002-4632-8891
author_role author
author2 Valenzuela, Sergio O.|||0000-0002-4632-8891
author2_role author
description This article presents the current puzzling controversy between theory and experimental results concerning the mechanisms leading to spin relaxation in graphene-based materials. On the experimental side, it is surprising that regardless of the quality of the graphene monolayer, which is characterized by the carrier mobility, the typical Hanle precession measurements yield spin diffusion times in the order of which is several orders of magnitude below the theoretical estimates based on the expected low intrinsic spin-orbit coupling in graphene. The results are weakly dependent on whether graphene is deposited or boron-nitride substrates or is suspended, with the mobility spanning 3 orders of magnitude. On the other hand, extraction form two-terminal magnetoresistance measurements, accounting for contact effects results in 0.1 s, and corresponding diffusion lengths of about 100 m up to room temperature. Such discrepancy jeopardizes further progress towards spin manipulation on a lateral graphene two-dimensional platform. After a presentation of basic concepts, we here discuss state-of-the-art literature and the limits of all known approaches to describe spin transport in massless-Dirac fermions, in which the effects of strong local spin-orbit coupling ceases to be accessible with perturbative approaches. We focus on the limits of conventional views of spin transport in graphene and offer novel perspectives for further progress.
publishDate 2014
dc.date.none.fl_str_mv 2
2014-01-01
2014
2014-01-01
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/232117
https://dx.doi.org/urn:doi:10.1088/0022-3727/47/9/094011
url https://ddd.uab.cat/record/232117
https://dx.doi.org/urn:doi:10.1088/0022-3727/47/9/094011
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 MAT2010-18065
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2012-33911
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
_version_ 1869416805766791168
score 15.301603

Similares en LA Referencia