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

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Show simple item record Estrada Saldaña, J. C. Žitko, R. Cleuziou, J. P. Lee, E. J.H. Zannier, V. Ercolani, D. Sorba, L. Aguado, R. De Franceschi, S.
dc.contributor.other UAM. Departamento de Física de Materiales es_ES 2020-05-04T11:45:51Z 2020-05-04T11:45:51Z 2019-01-01
dc.identifier.citation Science Advances 5.7 (2019): eaav1235 en_US
dc.identifier.issn 2375-2548
dc.description.abstract 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 en_US
dc.description.sponsorship We 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 J1-7259 en_US
dc.format.extent 8 pag. en_US
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher American Association for the Advancement of Science (A A A S) en_US
dc.relation.ispartof Science Advances en_US
dc.rights © 2019 The Authors en_US
dc.subject.other Majorana edge en_US
dc.subject.other Semiconductor nanowire en_US
dc.subject.other Superconductor en_US
dc.subject.other InAs nanowire en_US
dc.title Charge localization and reentrant superconductivity in a quasi-ballistic InAs nanowire coupled to superconductors en_US
dc.type article en
dc.subject.eciencia Física es
dc.identifier.doi 10.1126/sciadv.aav1235
dc.identifier.publicationfirstpage eaav1235-1
dc.identifier.publicationissue 7
dc.identifier.publicationlastpage eaav1235-8
dc.identifier.publicationvolume 5
dc.relation.projectID Gobierno de España. FIS2015-64654-P es_ES
dc.type.version info:eu-repo/semantics/publishedVersion en Reconocimiento es_ES
dc.rights.accessRights openAccess en
dc.authorUAM Lee, Eduardo Jian Hua (274130)

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