Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator

19 págs.; 11 figs.; 1 tab.; 5 apéndices

Bibliographic Details
Authors: Ortiz, Laura, Molina, Rafael A., Platero, Gloria, Lunde, A. M.
Format: article
Status:Published version
Publication Date:2016
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/140314
Online Access:http://hdl.handle.net/10261/140314
Access Level:Open access
id ES_6ca29c64bf5c321f5f1bbc436d168cb2
oai_identifier_str oai:digital.csic.es:10261/140314
network_acronym_str ES
network_name_str España
repository_id_str
spelling Generic helical edge states due to Rashba spin-orbit coupling in a topological insulatorOrtiz, LauraMolina, Rafael A.Platero, GloriaLunde, A. M.19 págs.; 11 figs.; 1 tab.; 5 apéndicesWe study the helical edge states of a two-dimensional topological insulator without axial spin symmetry due to the Rashba spin-orbit interaction. Lack of axial spin symmetry can lead to so-called generic helical edge states, which have energy-dependent spin orientation. This opens the possibility of inelastic backscattering and thereby nonquantized transport. Here we find analytically the new dispersion relations and the energy dependent spin orientation of the generic helical edge states in the presence of Rashba spin-orbit coupling within the Bernevig-Hughes-Zhang model, for both a single isolated edge and for a finite width ribbon. In the single-edge case, we analytically quantify the energy dependence of the spin orientation, which turns out to be weak for a realistic HgTe quantum well. Nevertheless, finite size effects combined with Rashba spin-orbit coupling result in two avoided crossings in the energy dispersions, where the spin orientation variation of the edge states is very significantly increased for realistic parameters. Finally, our analytical results are found to compare well to a numerical tight-binding regularization of the model. ©2016 American Physical SocietyThis work has been funded by Spanish Government projects: FIS2012-33152, FIS2012-34479, MAT2014- 58241-P, FIS2015-63770-P and CAM research consortium QUITEMAD+ S2013/ICE-2801. AML acknowledges A. Fernandez Romero and financial support from the Carlsberg Foundation.Peer ReviewedAmerican Physical SocietyMinisterio de Economía y Competitividad (España)Comunidad de MadridConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016201620162016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/140314reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-63770-PS2013/ICE-2801/QUITEMAD+-CMhttps://doi.org/10.1103/PhysRevB.93.205431Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1403142026-05-22T06:33:51Z
dc.title.none.fl_str_mv Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
title Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
spellingShingle Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
Ortiz, Laura
title_short Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
title_full Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
title_fullStr Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
title_full_unstemmed Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
title_sort Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
dc.creator.none.fl_str_mv Ortiz, Laura
Molina, Rafael A.
Platero, Gloria
Lunde, A. M.
author Ortiz, Laura
author_facet Ortiz, Laura
Molina, Rafael A.
Platero, Gloria
Lunde, A. M.
author_role author
author2 Molina, Rafael A.
Platero, Gloria
Lunde, A. M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Comunidad de Madrid
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description 19 págs.; 11 figs.; 1 tab.; 5 apéndices
publishDate 2016
dc.date.none.fl_str_mv 2016
2016
2016
2016
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/10261/140314
url http://hdl.handle.net/10261/140314
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#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-63770-P
S2013/ICE-2801/QUITEMAD+-CM
https://doi.org/10.1103/PhysRevB.93.205431
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
_version_ 1869410282038624256
score 15,811543

Similar Items