Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors

A semiconductor nanowire with strong spin-orbit coupling in proximity to a superconductor is predicted to display Majorana edge states emerging under a properly oriented magnetic field. The experimental investigation of these exotic states requires assessing the one-dimensional (1D) character of the...

Descripción completa

Detalles Bibliográficos
Autores: Estrada Saldaña, J. C., Žitko, R., Cleuziou, J. P., Lee, Eduardo Jian Hua, Zannier, V., Ercolani, D., Sorba, L., Aguado, R., De Franceschi, S.
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/690967
Acceso en línea:http://hdl.handle.net/10486/690967
https://dx.doi.org/10.1126/sciadv.aav1235
Access Level:acceso abierto
Palabra clave:Majorana edge
Semiconductor nanowire
Superconductor
InAs nanowire
Física
id ES_fc447b0878de7447aa39f53fd8d2cdcc
oai_identifier_str oai:repositorio.uam.es:10486/690967
network_acronym_str ES
network_name_str España
repository_id_str
spelling Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductorsEstrada Saldaña, J. C.Žitko, R.Cleuziou, J. P.Lee, Eduardo Jian HuaZannier, V.Ercolani, D.Sorba, L.Aguado, R.De Franceschi, S.Majorana edgeSemiconductor nanowireSuperconductorInAs nanowireFísicaA semiconductor nanowire with strong spin-orbit coupling in proximity to a superconductor is predicted to display Majorana edge states emerging under a properly oriented magnetic field. The experimental investigation of these exotic states requires assessing the one-dimensional (1D) character of the nanowire and understanding the superconducting proximity effect in the presence of a magnetic field. Here, we explore the quasi-ballistic 1D transport regime of an InAs nanowire with Ta contacts. Fine-tuned by means of local gates, the observed plateaus of approximately quantized conductance hide the presence of a localized electron, giving rise to a lurking Coulomb blockade effect and Kondo physics. When Ta becomes superconducting, this local charge causes an unusual, reentrant magnetic field dependence of the supercurrent, which we ascribe to a 0 - p transition. Our results underline the relevant role of unintentional charge localization in the few-channel regime where helical subbands and Majorana quasi-particles are expected to ariseWe acknowledge financial support from the Agence Nationale de la Recherche (TOPONANO project) and from the EU (ERC grant no. 280043). R.A. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (grant FIS2015-64654-P). R.Ž. acknowledges support from the Slovenian Research Agency (ARRS) under Program P1- 0044 and J1-7259American Association for the Advancement of Science (A A A S)Departamento de Física de MaterialesFacultad de Ciencias20192019-01-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/690967https://dx.doi.org/10.1126/sciadv.aav1235reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6909672026-06-23T12:46:27Z
dc.title.none.fl_str_mv Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
title Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
spellingShingle Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
Estrada Saldaña, J. C.
Majorana edge
Semiconductor nanowire
Superconductor
InAs nanowire
Física
title_short Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
title_full Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
title_fullStr Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
title_full_unstemmed Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
title_sort Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors
dc.creator.none.fl_str_mv Estrada Saldaña, J. C.
Žitko, R.
Cleuziou, J. P.
Lee, Eduardo Jian Hua
Zannier, V.
Ercolani, D.
Sorba, L.
Aguado, R.
De Franceschi, S.
author Estrada Saldaña, J. C.
author_facet Estrada Saldaña, J. C.
Žitko, R.
Cleuziou, J. P.
Lee, Eduardo Jian Hua
Zannier, V.
Ercolani, D.
Sorba, L.
Aguado, R.
De Franceschi, S.
author_role author
author2 Žitko, R.
Cleuziou, J. P.
Lee, Eduardo Jian Hua
Zannier, V.
Ercolani, D.
Sorba, L.
Aguado, R.
De Franceschi, S.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física de Materiales
Facultad de Ciencias
dc.subject.none.fl_str_mv Majorana edge
Semiconductor nanowire
Superconductor
InAs nanowire
Física
topic Majorana edge
Semiconductor nanowire
Superconductor
InAs nanowire
Física
description A semiconductor nanowire with strong spin-orbit coupling in proximity to a superconductor is predicted to display Majorana edge states emerging under a properly oriented magnetic field. The experimental investigation of these exotic states requires assessing the one-dimensional (1D) character of the nanowire and understanding the superconducting proximity effect in the presence of a magnetic field. Here, we explore the quasi-ballistic 1D transport regime of an InAs nanowire with Ta contacts. Fine-tuned by means of local gates, the observed plateaus of approximately quantized conductance hide the presence of a localized electron, giving rise to a lurking Coulomb blockade effect and Kondo physics. When Ta becomes superconducting, this local charge causes an unusual, reentrant magnetic field dependence of the supercurrent, which we ascribe to a 0 - p transition. Our results underline the relevant role of unintentional charge localization in the few-channel regime where helical subbands and Majorana quasi-particles are expected to arise
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-01-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/690967
https://dx.doi.org/10.1126/sciadv.aav1235
url http://hdl.handle.net/10486/690967
https://dx.doi.org/10.1126/sciadv.aav1235
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Association for the Advancement of Science (A A A S)
publisher.none.fl_str_mv American Association for the Advancement of Science (A A A S)
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425406068654080
score 15,300724

Similares en LA Referencia