Giant spin transport anisotropy in magnetic topological insulators

We report on exceptionally long spin transport and giant spin lifetime anisotropy in the gapped surface states of three-dimensional (3D) magnetic topological insulators (MTIs). We examine the properties of these states using the three-dimensional Fu-Kane-Mele Hamiltonian model in the presence of a m...

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Detalles Bibliográficos
Autores: Vila Tusell, Marc|||0000-0001-9118-421X, Cummings, Aron|||0000-0003-2307-497X, Roche, Stephan|||0000-0003-0323-4665
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:308334
Acceso en línea:https://ddd.uab.cat/record/308334
https://dx.doi.org/urn:doi:10.1103/PhysRevB.109.195435
Access Level:acceso abierto
Palabra clave:Exchange fields
Hamiltonian models
Magnetic exchange
Out-of-plane
Property
Spin lifetimes
Spin textures
Spin transport
Topological insulators
Two-band model
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spelling Giant spin transport anisotropy in magnetic topological insulatorsVila Tusell, Marc|||0000-0001-9118-421XCummings, Aron|||0000-0003-2307-497XRoche, Stephan|||0000-0003-0323-4665Exchange fieldsHamiltonian modelsMagnetic exchangeOut-of-planePropertySpin lifetimesSpin texturesSpin transportTopological insulatorsTwo-band modelWe report on exceptionally long spin transport and giant spin lifetime anisotropy in the gapped surface states of three-dimensional (3D) magnetic topological insulators (MTIs). We examine the properties of these states using the three-dimensional Fu-Kane-Mele Hamiltonian model in the presence of a magnetic exchange field. The corresponding spin textures of surface states, which are well reproduced by an effective two-band model, hint at a considerable enhancement of the lifetime of out-of-plane spins compared to in-plane spins. This is confirmed by large-scale spin transport simulations for 3D MTIs with disorder. The energy dependence of the spin lifetime anisotropy arises directly from the nontrivial spin texture of the surface states, and is correlated with the onset of the quantum anomalous Hall phase. Our findings suggest different spin filtering capabilities of the gapped surface MTI states, which could be explored by nonlocal spin valve measurements. 22024-01-0120242024-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/308334https://dx.doi.org/urn:doi:10.1103/PhysRevB.109.195435reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 824140Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 CEX2021-001214-SMinisterio de Ciencia e Innovación https://doi.org/10.13039/501100004837 PRTR-C17.I1Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2022-138283NB-I00Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/SGR-00997open 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:3083342026-06-06T12:50:31Z
dc.title.none.fl_str_mv Giant spin transport anisotropy in magnetic topological insulators
title Giant spin transport anisotropy in magnetic topological insulators
spellingShingle Giant spin transport anisotropy in magnetic topological insulators
Vila Tusell, Marc|||0000-0001-9118-421X
Exchange fields
Hamiltonian models
Magnetic exchange
Out-of-plane
Property
Spin lifetimes
Spin textures
Spin transport
Topological insulators
Two-band model
title_short Giant spin transport anisotropy in magnetic topological insulators
title_full Giant spin transport anisotropy in magnetic topological insulators
title_fullStr Giant spin transport anisotropy in magnetic topological insulators
title_full_unstemmed Giant spin transport anisotropy in magnetic topological insulators
title_sort Giant spin transport anisotropy in magnetic topological insulators
dc.creator.none.fl_str_mv Vila Tusell, Marc|||0000-0001-9118-421X
Cummings, Aron|||0000-0003-2307-497X
Roche, Stephan|||0000-0003-0323-4665
author Vila Tusell, Marc|||0000-0001-9118-421X
author_facet Vila Tusell, Marc|||0000-0001-9118-421X
Cummings, Aron|||0000-0003-2307-497X
Roche, Stephan|||0000-0003-0323-4665
author_role author
author2 Cummings, Aron|||0000-0003-2307-497X
Roche, Stephan|||0000-0003-0323-4665
author2_role author
author
dc.subject.none.fl_str_mv Exchange fields
Hamiltonian models
Magnetic exchange
Out-of-plane
Property
Spin lifetimes
Spin textures
Spin transport
Topological insulators
Two-band model
topic Exchange fields
Hamiltonian models
Magnetic exchange
Out-of-plane
Property
Spin lifetimes
Spin textures
Spin transport
Topological insulators
Two-band model
description We report on exceptionally long spin transport and giant spin lifetime anisotropy in the gapped surface states of three-dimensional (3D) magnetic topological insulators (MTIs). We examine the properties of these states using the three-dimensional Fu-Kane-Mele Hamiltonian model in the presence of a magnetic exchange field. The corresponding spin textures of surface states, which are well reproduced by an effective two-band model, hint at a considerable enhancement of the lifetime of out-of-plane spins compared to in-plane spins. This is confirmed by large-scale spin transport simulations for 3D MTIs with disorder. The energy dependence of the spin lifetime anisotropy arises directly from the nontrivial spin texture of the surface states, and is correlated with the onset of the quantum anomalous Hall phase. Our findings suggest different spin filtering capabilities of the gapped surface MTI states, which could be explored by nonlocal spin valve measurements.
publishDate 2024
dc.date.none.fl_str_mv 2
2024-01-01
2024
2024-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/308334
https://dx.doi.org/urn:doi:10.1103/PhysRevB.109.195435
url https://ddd.uab.cat/record/308334
https://dx.doi.org/urn:doi:10.1103/PhysRevB.109.195435
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 824140
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 CEX2021-001214-S
Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 PRTR-C17.I1
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2022-138283NB-I00
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/SGR-00997
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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