Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance

Detalhes bibliográficos
Autor(a) principal: Campo, V. L.
Data de Publicação: 2017
Outros Autores: Ricco, L. S. [UNESP], Seridonio, A. C. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1103/PhysRevB.96.045135
http://hdl.handle.net/11449/174970
Resumo: The zero-bias peak (ZBP) is understood as the definite signature of a Majorana bound state (MBS) when attached to a semi-infinite Kitaev nanowire (KNW) nearby zero temperature. However, such characteristics concerning the realization of the KNW constitute a profound experimental challenge. We explore theoretically a QD connected to a topological KNW of finite size at nonzero temperatures and show that overlapped MBSs of the wire edges can become effectively decoupled from each other and the characteristic ZBP can be fully recovered if one tunes the system into the leaked Majorana fermion fixed point. At very low temperatures, the MBSs become strongly coupled. We derive universal features of the conductance as a function of the temperature and the relevant crossover temperatures. Our findings offer additional guides to identify signatures of MBSs in solid state setups.
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spelling Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductanceThe zero-bias peak (ZBP) is understood as the definite signature of a Majorana bound state (MBS) when attached to a semi-infinite Kitaev nanowire (KNW) nearby zero temperature. However, such characteristics concerning the realization of the KNW constitute a profound experimental challenge. We explore theoretically a QD connected to a topological KNW of finite size at nonzero temperatures and show that overlapped MBSs of the wire edges can become effectively decoupled from each other and the characteristic ZBP can be fully recovered if one tunes the system into the leaked Majorana fermion fixed point. At very low temperatures, the MBSs become strongly coupled. We derive universal features of the conductance as a function of the temperature and the relevant crossover temperatures. Our findings offer additional guides to identify signatures of MBSs in solid state setups.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Departamento de Física Universidade Federal de São Carlos, Rodovia Washington Luiz, km 235, Caixa Postal 676Departamento de Física e Química Unesp - Univ Estadual PaulistaInstituto de Geociências e Ciências Exatas - IGCe Universidade Estadual Paulista Departamento de FísicaDepartamento de Física e Química Unesp - Univ Estadual PaulistaInstituto de Geociências e Ciências Exatas - IGCe Universidade Estadual Paulista Departamento de FísicaFAPESP: 2015/23539-8CNPq: 307573/2015-0Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Campo, V. L.Ricco, L. S. [UNESP]Seridonio, A. C. [UNESP]2018-12-11T17:13:40Z2018-12-11T17:13:40Z2017-07-24info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1103/PhysRevB.96.045135Physical Review B, v. 96, n. 4, 2017.2469-99692469-9950http://hdl.handle.net/11449/17497010.1103/PhysRevB.96.0451352-s2.0-850264240122-s2.0-85026424012.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Binfo:eu-repo/semantics/openAccess2023-11-08T06:08:34Zoai:repositorio.unesp.br:11449/174970Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:08:20.913265Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
title Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
spellingShingle Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
Campo, V. L.
title_short Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
title_full Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
title_fullStr Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
title_full_unstemmed Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
title_sort Isolating Majorana fermions with finite Kitaev nanowires and temperature: Universality of the zero-bias conductance
author Campo, V. L.
author_facet Campo, V. L.
Ricco, L. S. [UNESP]
Seridonio, A. C. [UNESP]
author_role author
author2 Ricco, L. S. [UNESP]
Seridonio, A. C. [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Federal de São Carlos (UFSCar)
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Campo, V. L.
Ricco, L. S. [UNESP]
Seridonio, A. C. [UNESP]
description The zero-bias peak (ZBP) is understood as the definite signature of a Majorana bound state (MBS) when attached to a semi-infinite Kitaev nanowire (KNW) nearby zero temperature. However, such characteristics concerning the realization of the KNW constitute a profound experimental challenge. We explore theoretically a QD connected to a topological KNW of finite size at nonzero temperatures and show that overlapped MBSs of the wire edges can become effectively decoupled from each other and the characteristic ZBP can be fully recovered if one tunes the system into the leaked Majorana fermion fixed point. At very low temperatures, the MBSs become strongly coupled. We derive universal features of the conductance as a function of the temperature and the relevant crossover temperatures. Our findings offer additional guides to identify signatures of MBSs in solid state setups.
publishDate 2017
dc.date.none.fl_str_mv 2017-07-24
2018-12-11T17:13:40Z
2018-12-11T17:13:40Z
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.96.045135
Physical Review B, v. 96, n. 4, 2017.
2469-9969
2469-9950
http://hdl.handle.net/11449/174970
10.1103/PhysRevB.96.045135
2-s2.0-85026424012
2-s2.0-85026424012.pdf
url http://dx.doi.org/10.1103/PhysRevB.96.045135
http://hdl.handle.net/11449/174970
identifier_str_mv Physical Review B, v. 96, n. 4, 2017.
2469-9969
2469-9950
10.1103/PhysRevB.96.045135
2-s2.0-85026424012
2-s2.0-85026424012.pdf
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 application/pdf
dc.source.none.fl_str_mv Scopus
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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