Chiral spin channels in curved graphene pn junctions

We show that the chiral modes in circular graphene pn junctions provide an advantage for spin manipulation via spin-orbit coupling compared to semiconductor platforms. We derive the effective Hamiltonian for the spin dynamics of the junction's zero modes and calculate their quantum phases. We f...

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Bibliographic Details
Authors: Bercioux, Dario, Frustaglia, Diego César, De Martino, Alessandro
Format: article
Status:Published version
Publication Date:2023
Country:España
Institution:Universidad de Sevilla (US)
Repository:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/149708
Online Access:https://hdl.handle.net/11441/149708
https://doi.org/10.1103/PhysRevB.108.115140
Access Level:Open access
Keyword:Chiral modes
Circular graphene pn junctions
Semiconductor platforms
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spelling Chiral spin channels in curved graphene pn junctionsBercioux, DarioFrustaglia, Diego CésarDe Martino, AlessandroChiral modesCircular graphene pn junctionsSemiconductor platformsWe show that the chiral modes in circular graphene pn junctions provide an advantage for spin manipulation via spin-orbit coupling compared to semiconductor platforms. We derive the effective Hamiltonian for the spin dynamics of the junction's zero modes and calculate their quantum phases. We find a sweet spot in parameter space where the spin is fully in-plane and radially polarized for a given junction polarity. This represents a shortcut to singular spin configurations that would otherwise require spin-orbit coupling strengths beyond experimental reach.American Physical SocietyFísica Aplicada IIFQM239: Fundamentos de Mecánica CuánticaMinisterio de Ciencia, Innovación y Universidades (MICINN). EspañaGobierno VascoJunta de AndalucíaEuropean Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER)2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/149708https://doi.org/10.1103/PhysRevB.108.115140reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésPhysical Review B, 108 (115140).PID2020-120614GB-I00QUAN-000021-01PID2021-127250NB-I00P20-00548US1380932https://journals.aps.org/prb/pdf/10.1103/PhysRevB.108.115140info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1497082026-06-17T12:51:07Z
dc.title.none.fl_str_mv Chiral spin channels in curved graphene pn junctions
title Chiral spin channels in curved graphene pn junctions
spellingShingle Chiral spin channels in curved graphene pn junctions
Bercioux, Dario
Chiral modes
Circular graphene pn junctions
Semiconductor platforms
title_short Chiral spin channels in curved graphene pn junctions
title_full Chiral spin channels in curved graphene pn junctions
title_fullStr Chiral spin channels in curved graphene pn junctions
title_full_unstemmed Chiral spin channels in curved graphene pn junctions
title_sort Chiral spin channels in curved graphene pn junctions
dc.creator.none.fl_str_mv Bercioux, Dario
Frustaglia, Diego César
De Martino, Alessandro
author Bercioux, Dario
author_facet Bercioux, Dario
Frustaglia, Diego César
De Martino, Alessandro
author_role author
author2 Frustaglia, Diego César
De Martino, Alessandro
author2_role author
author
dc.contributor.none.fl_str_mv Física Aplicada II
FQM239: Fundamentos de Mecánica Cuántica
Ministerio de Ciencia, Innovación y Universidades (MICINN). España
Gobierno Vasco
Junta de Andalucía
European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER)
dc.subject.none.fl_str_mv Chiral modes
Circular graphene pn junctions
Semiconductor platforms
topic Chiral modes
Circular graphene pn junctions
Semiconductor platforms
description We show that the chiral modes in circular graphene pn junctions provide an advantage for spin manipulation via spin-orbit coupling compared to semiconductor platforms. We derive the effective Hamiltonian for the spin dynamics of the junction's zero modes and calculate their quantum phases. We find a sweet spot in parameter space where the spin is fully in-plane and radially polarized for a given junction polarity. This represents a shortcut to singular spin configurations that would otherwise require spin-orbit coupling strengths beyond experimental reach.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/149708
https://doi.org/10.1103/PhysRevB.108.115140
url https://hdl.handle.net/11441/149708
https://doi.org/10.1103/PhysRevB.108.115140
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Physical Review B, 108 (115140).
PID2020-120614GB-I00
QUAN-000021-01
PID2021-127250NB-I00
P20-00548
US1380932
https://journals.aps.org/prb/pdf/10.1103/PhysRevB.108.115140
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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