Scattering of topological kink-antikink states in bilayer graphene structures

Gapped bilayer graphene can support the presence of intragap states due to kink gate potentials applied to the graphene layers. Electrons in these states display valley-momentum locking, which makes them attractive for topological valleytronics. Here, we show that kink-antikink local potentials enab...

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Detalhes bibliográficos
Autores: Benchtaber, Nassima, Sánchez, David, Serra, Llorenç
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/266939
Acesso em linha:http://hdl.handle.net/10261/266939
Access Level:acceso abierto
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spelling Scattering of topological kink-antikink states in bilayer graphene structuresBenchtaber, NassimaSánchez, DavidSerra, LlorençGapped bilayer graphene can support the presence of intragap states due to kink gate potentials applied to the graphene layers. Electrons in these states display valley-momentum locking, which makes them attractive for topological valleytronics. Here, we show that kink-antikink local potentials enable modulated scattering of topological currents. We find that the kink-antikink coupling leads to anomalous steps in the junction conductance. Further, when the constriction detaches from the propagating modes, forming a loop, the conductance reveals the system energy spectrum. Remarkably, these kink-antikink devices can also work as valley filters with tiny magnetic fields by tuning a central gate.We acknowledge support from MINECO (Spain) Grants No. MAT2017-82639 and No. PID2020-117347GB-I00 and MINECO/AEI/FEDER María de Maeztu Program for Units of Excellence MDM2017-0711.American Physical SocietyMinisterio de Economía y Competitividad (España)Agencia Estatal de Investigación (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/266939reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-82639-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117347GB-I00info:eu-repo/grantAgreement/MINECO//MDM2017-0711http://dx.doi.org/10.1103/PhysRevB.104.155303Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2669392026-05-22T06:33:51Z
dc.title.none.fl_str_mv Scattering of topological kink-antikink states in bilayer graphene structures
title Scattering of topological kink-antikink states in bilayer graphene structures
spellingShingle Scattering of topological kink-antikink states in bilayer graphene structures
Benchtaber, Nassima
title_short Scattering of topological kink-antikink states in bilayer graphene structures
title_full Scattering of topological kink-antikink states in bilayer graphene structures
title_fullStr Scattering of topological kink-antikink states in bilayer graphene structures
title_full_unstemmed Scattering of topological kink-antikink states in bilayer graphene structures
title_sort Scattering of topological kink-antikink states in bilayer graphene structures
dc.creator.none.fl_str_mv Benchtaber, Nassima
Sánchez, David
Serra, Llorenç
author Benchtaber, Nassima
author_facet Benchtaber, Nassima
Sánchez, David
Serra, Llorenç
author_role author
author2 Sánchez, David
Serra, Llorenç
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Agencia Estatal de Investigación (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Gapped bilayer graphene can support the presence of intragap states due to kink gate potentials applied to the graphene layers. Electrons in these states display valley-momentum locking, which makes them attractive for topological valleytronics. Here, we show that kink-antikink local potentials enable modulated scattering of topological currents. We find that the kink-antikink coupling leads to anomalous steps in the junction conductance. Further, when the constriction detaches from the propagating modes, forming a loop, the conductance reveals the system energy spectrum. Remarkably, these kink-antikink devices can also work as valley filters with tiny magnetic fields by tuning a central gate.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/266939
url http://hdl.handle.net/10261/266939
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-82639-P
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-117347GB-I00
info:eu-repo/grantAgreement/MINECO//MDM2017-0711
http://dx.doi.org/10.1103/PhysRevB.104.155303
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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