Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevB.101.195422 http://hdl.handle.net/11449/196885 |
Resumo: | We report anisotropic spin polarization of edge currents in MoS2 and WS2 monolayer zigzag nanoribbons (ZNRs) deposited on either nonmagnetic or ferromagnetic insulator substrates. We employ an 11-band tight-binding model to calculate the electronic band structures of transition metal dichalcogenide (TMDC) monolayers and their corresponding nanoribbons in the presence of Rashba spin-orbit coupling (RSOC) and magnetic proximity effect produced by ferromagnetic substrate. We adopt the nonequilibrium Green's function method together with Landauer-Bfittiker formalism to study the quantum transport behavior stemming from the edge states of ZNRs. We demonstrate that the spin-polarized edge current can be generated in both MoS2 and WS2 ZNRs with RSOC. We find that the spin polarization spreads out in all three directions. This is in stark contrast to what occurs in zigzag graphene nanoribbons, for which the polarization only exists in the transverse direction (across the width of ribbons). In addition, the spin polarization direction strongly depends on the strength of the intrinsic SOC component. The interplay of Rashba and intrinsic SOC is crucial for the spin polarization of the currents in any spatial direction. For TMDCs with stronger intrinsic SOC such as in WS2 monolayer ZNRs, we observe that the spin polarization along the perpendicular direction to the plane of the ZNR can be as large as 90%. Moreover, the unusual anisotropy of the spin polarization can be further enhanced by the magnetic proximity effect. These results open up possibilities for the generation of tunable high-spin polarization currents in ZNRs without application of an external magnetic field. |
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Repositório Institucional da UNESP |
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spelling |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbonsWe report anisotropic spin polarization of edge currents in MoS2 and WS2 monolayer zigzag nanoribbons (ZNRs) deposited on either nonmagnetic or ferromagnetic insulator substrates. We employ an 11-band tight-binding model to calculate the electronic band structures of transition metal dichalcogenide (TMDC) monolayers and their corresponding nanoribbons in the presence of Rashba spin-orbit coupling (RSOC) and magnetic proximity effect produced by ferromagnetic substrate. We adopt the nonequilibrium Green's function method together with Landauer-Bfittiker formalism to study the quantum transport behavior stemming from the edge states of ZNRs. We demonstrate that the spin-polarized edge current can be generated in both MoS2 and WS2 ZNRs with RSOC. We find that the spin polarization spreads out in all three directions. This is in stark contrast to what occurs in zigzag graphene nanoribbons, for which the polarization only exists in the transverse direction (across the width of ribbons). In addition, the spin polarization direction strongly depends on the strength of the intrinsic SOC component. The interplay of Rashba and intrinsic SOC is crucial for the spin polarization of the currents in any spatial direction. For TMDCs with stronger intrinsic SOC such as in WS2 monolayer ZNRs, we observe that the spin polarization along the perpendicular direction to the plane of the ZNR can be as large as 90%. Moreover, the unusual anisotropy of the spin polarization can be further enhanced by the magnetic proximity effect. These results open up possibilities for the generation of tunable high-spin polarization currents in ZNRs without application of an external magnetic field.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)FAPDFQufu Normal UniversityNational Natural Science Foundation of ChinaSpanish MINECOEuropean UnionQufu Normal Univ, Dept Phys, Qufu 273165, Shandong, Peoples R ChinaUniv Brasilia, Inst Fis, BR-70919970 Brasilia, DF, BrazilUniv Estadual Paulista, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, BrazilUniv Fed Sao Carlos, Ctr Ciencias Exatas & Tecnol, Dept Fis, BR-13565905 Sao Carlos, SP, BrazilCSIC, Inst Ciencia Mat Madrid, C Sor Juana Ines de la Cruz 3, Madrid 28049, SpainUniv Estadual Paulista, Dept Fis, IGCE, BR-13506900 Rio Claro, SP, BrazilNational Natural Science Foundation of China: 11004120National Natural Science Foundation of China: 11874236European Union: FIS2015-64654 P/MINECO/FEDEREuropean Union: PGC2018-097018-B-I00Amer Physical SocQufu Normal UnivUniversidade de Brasília (UnB)Universidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)CSICCorrea, J. H.Dias, A. C.Villegas-Lelovsky, L. [UNESP]Fu, JiyongChico, LeonorQu, Fanyao2020-12-10T19:59:16Z2020-12-10T19:59:16Z2020-05-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article13http://dx.doi.org/10.1103/PhysRevB.101.195422Physical Review B. College Pk: Amer Physical Soc, v. 101, n. 19, 13 p., 2020.2469-9950http://hdl.handle.net/11449/19688510.1103/PhysRevB.101.195422WOS:000533156700004Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Binfo:eu-repo/semantics/openAccess2021-10-23T09:55:29Zoai:repositorio.unesp.br:11449/196885Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T09:55:29Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
title |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
spellingShingle |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons Correa, J. H. |
title_short |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
title_full |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
title_fullStr |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
title_full_unstemmed |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
title_sort |
Anisotropy of the spin-polarized edge current in monolayer transition metal dichalcogenide zigzag nanoribbons |
author |
Correa, J. H. |
author_facet |
Correa, J. H. Dias, A. C. Villegas-Lelovsky, L. [UNESP] Fu, Jiyong Chico, Leonor Qu, Fanyao |
author_role |
author |
author2 |
Dias, A. C. Villegas-Lelovsky, L. [UNESP] Fu, Jiyong Chico, Leonor Qu, Fanyao |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Qufu Normal Univ Universidade de Brasília (UnB) Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) CSIC |
dc.contributor.author.fl_str_mv |
Correa, J. H. Dias, A. C. Villegas-Lelovsky, L. [UNESP] Fu, Jiyong Chico, Leonor Qu, Fanyao |
description |
We report anisotropic spin polarization of edge currents in MoS2 and WS2 monolayer zigzag nanoribbons (ZNRs) deposited on either nonmagnetic or ferromagnetic insulator substrates. We employ an 11-band tight-binding model to calculate the electronic band structures of transition metal dichalcogenide (TMDC) monolayers and their corresponding nanoribbons in the presence of Rashba spin-orbit coupling (RSOC) and magnetic proximity effect produced by ferromagnetic substrate. We adopt the nonequilibrium Green's function method together with Landauer-Bfittiker formalism to study the quantum transport behavior stemming from the edge states of ZNRs. We demonstrate that the spin-polarized edge current can be generated in both MoS2 and WS2 ZNRs with RSOC. We find that the spin polarization spreads out in all three directions. This is in stark contrast to what occurs in zigzag graphene nanoribbons, for which the polarization only exists in the transverse direction (across the width of ribbons). In addition, the spin polarization direction strongly depends on the strength of the intrinsic SOC component. The interplay of Rashba and intrinsic SOC is crucial for the spin polarization of the currents in any spatial direction. For TMDCs with stronger intrinsic SOC such as in WS2 monolayer ZNRs, we observe that the spin polarization along the perpendicular direction to the plane of the ZNR can be as large as 90%. Moreover, the unusual anisotropy of the spin polarization can be further enhanced by the magnetic proximity effect. These results open up possibilities for the generation of tunable high-spin polarization currents in ZNRs without application of an external magnetic field. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T19:59:16Z 2020-12-10T19:59:16Z 2020-05-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevB.101.195422 Physical Review B. College Pk: Amer Physical Soc, v. 101, n. 19, 13 p., 2020. 2469-9950 http://hdl.handle.net/11449/196885 10.1103/PhysRevB.101.195422 WOS:000533156700004 |
url |
http://dx.doi.org/10.1103/PhysRevB.101.195422 http://hdl.handle.net/11449/196885 |
identifier_str_mv |
Physical Review B. College Pk: Amer Physical Soc, v. 101, n. 19, 13 p., 2020. 2469-9950 10.1103/PhysRevB.101.195422 WOS:000533156700004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review B |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
13 |
dc.publisher.none.fl_str_mv |
Amer Physical Soc |
publisher.none.fl_str_mv |
Amer Physical Soc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1803046744378834944 |