Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires

Hybrid semiconducting nanowire devices combining epitaxial superconductor and ferromagnetic insulator layers have been recently explored experimentally as an alternative platform for topological superconductivity at zero applied magnetic field. In this proof-of-principle work we show that the topolo...

Descripción completa

Detalles Bibliográficos
Autores: Díaz Escribano, Samuel, Prada, Elsa, Oreg, Yuval, Levy-Yeyati Mizrahi, Alfredo
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/705061
Acceso en línea:http://hdl.handle.net/10486/705061
https://dx.doi.org/10.1103/PhysRevB.104.L041404
Access Level:acceso abierto
Palabra clave:Applied Magnetic Fields
Electrostatic Environments
Ferromagnetic Insulator
Geometrical Constraints
Proof of Principles
Self-Consistent Mean Field
Semiconducting Nanowires
Superconducting Proximity
Física
id ES_ddfe42e25584dafa84823eff913fa24c
oai_identifier_str oai:repositorio.uam.es:10486/705061
network_acronym_str ES
network_name_str España
repository_id_str
spelling Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowiresDíaz Escribano, SamuelPrada, ElsaOreg, YuvalLevy-Yeyati Mizrahi, AlfredoApplied Magnetic FieldsElectrostatic EnvironmentsFerromagnetic InsulatorGeometrical ConstraintsProof of PrinciplesSelf-Consistent Mean FieldSemiconducting NanowiresSuperconducting ProximityFísicaHybrid semiconducting nanowire devices combining epitaxial superconductor and ferromagnetic insulator layers have been recently explored experimentally as an alternative platform for topological superconductivity at zero applied magnetic field. In this proof-of-principle work we show that the topological regime can be reached in actual devices depending on some geometrical constraints. To this end, we perform numerical simulations of InAs wires in which we explicitly include the superconducting Al and magnetic EuS shells, as well as the interaction with the electrostatic environment at a self-consistent mean-field level. Our calculations show that both the magnetic and the superconducting proximity effects on the nanowire can be tuned by nearby gates thanks to their ability to move the wavefunction across the wire section. We find that the topological phase is achieved in significant portions of the phase diagram only in configurations where the Al and EuS layers overlap on some wire facet, due to the rather local direct induced spin polarization and the appearance of an extra indirect exchange field through the superconductor. While of obvious relevance for the explanation of recent experiments, tunable proximity effects are of interest in the broader field of superconducting spintronicsAmerican Physical SocietyDepartamento de Física Teórica de la Materia CondensadaFacultad de Ciencias20212021-07-19research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/705061https://dx.doi.org/10.1103/PhysRevB.104.L041404reponame: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:10486/7050612026-06-23T12:46:27Z
dc.title.none.fl_str_mv Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
title Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
spellingShingle Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
Díaz Escribano, Samuel
Applied Magnetic Fields
Electrostatic Environments
Ferromagnetic Insulator
Geometrical Constraints
Proof of Principles
Self-Consistent Mean Field
Semiconducting Nanowires
Superconducting Proximity
Física
title_short Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
title_full Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
title_fullStr Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
title_full_unstemmed Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
title_sort Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
dc.creator.none.fl_str_mv Díaz Escribano, Samuel
Prada, Elsa
Oreg, Yuval
Levy-Yeyati Mizrahi, Alfredo
author Díaz Escribano, Samuel
author_facet Díaz Escribano, Samuel
Prada, Elsa
Oreg, Yuval
Levy-Yeyati Mizrahi, Alfredo
author_role author
author2 Prada, Elsa
Oreg, Yuval
Levy-Yeyati Mizrahi, Alfredo
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica de la Materia Condensada
Facultad de Ciencias
dc.subject.none.fl_str_mv Applied Magnetic Fields
Electrostatic Environments
Ferromagnetic Insulator
Geometrical Constraints
Proof of Principles
Self-Consistent Mean Field
Semiconducting Nanowires
Superconducting Proximity
Física
topic Applied Magnetic Fields
Electrostatic Environments
Ferromagnetic Insulator
Geometrical Constraints
Proof of Principles
Self-Consistent Mean Field
Semiconducting Nanowires
Superconducting Proximity
Física
description Hybrid semiconducting nanowire devices combining epitaxial superconductor and ferromagnetic insulator layers have been recently explored experimentally as an alternative platform for topological superconductivity at zero applied magnetic field. In this proof-of-principle work we show that the topological regime can be reached in actual devices depending on some geometrical constraints. To this end, we perform numerical simulations of InAs wires in which we explicitly include the superconducting Al and magnetic EuS shells, as well as the interaction with the electrostatic environment at a self-consistent mean-field level. Our calculations show that both the magnetic and the superconducting proximity effects on the nanowire can be tuned by nearby gates thanks to their ability to move the wavefunction across the wire section. We find that the topological phase is achieved in significant portions of the phase diagram only in configurations where the Al and EuS layers overlap on some wire facet, due to the rather local direct induced spin polarization and the appearance of an extra indirect exchange field through the superconductor. While of obvious relevance for the explanation of recent experiments, tunable proximity effects are of interest in the broader field of superconducting spintronics
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-07-19
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/10486/705061
https://dx.doi.org/10.1103/PhysRevB.104.L041404
url http://hdl.handle.net/10486/705061
https://dx.doi.org/10.1103/PhysRevB.104.L041404
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 Physical Society
publisher.none.fl_str_mv American Physical Society
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_ 1869421933777387520
score 15,301603

Similares en LA Referencia