Electronic structure of the surface-superconducting Weyl semimetal PtBi 2

Autores
Vocaturo, Riccardo; Koepernik, Klaus; Facio, Jorge Ismael; Timm, Carsten; Fulga, Ion Cosma; Janson, Oleg; van den Brink, Jeroen
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Trigonal PtBi2 is a layered semimetal without inversion symmetry, featuring 12 Weyl points in the vicinity of the Fermi energy. Its topological Fermi arcs were recently shown to superconduct at low temperatures where bulk superconductivity is absent. Here, we perform first-principles calculations to investigate in detail the bulk and surface electronic structure of PtBi2, and obtain the spin texture as well as the momentum-dependent localization of the arcs. Motivated by the experimentally observed recovery of inversion symmetry under pressure or upon doping, we interpolate between the two structures and determine the energy and momentum dependence of the Weyl nodes. For deeper insights into the surface superconductivity of PtBi2, we construct a symmetry-adapted effective four-band model that accurately reproduces the Weyl points of PtBi2. We supplement this model with an analysis of the symmetry-allowed pairings between the Fermi arcs, which naturally mix spin-singlet and spin-triplet channels. Moreover, the presence of surface-only superconductivity facilitates an intrinsic superconductor-semimetal-superconductor Josephson junction, with the semimetallic phase sandwiched between the two superconducting surfaces. For a phase difference of , zero-energy Andreev bound states develop between the two terminations.
Fil: Vocaturo, Riccardo. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Koepernik, Klaus. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Facio, Jorge Ismael. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; Argentina
Fil: Timm, Carsten. Technische Universität Dresden.; Alemania
Fil: Fulga, Ion Cosma. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Janson, Oleg. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: van den Brink, Jeroen. Leibniz Institute for Solid State and Materials Research; Alemania
Materia
WEYL
SEMIMETAL
PTBI2
TOPOLOGICAL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/264177
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/264177
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electronic structure of the surface-superconducting Weyl semimetal PtBi 2Vocaturo, RiccardoKoepernik, KlausFacio, Jorge IsmaelTimm, CarstenFulga, Ion CosmaJanson, Olegvan den Brink, JeroenWEYLSEMIMETALPTBI2TOPOLOGICALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Trigonal PtBi2 is a layered semimetal without inversion symmetry, featuring 12 Weyl points in the vicinity of the Fermi energy. Its topological Fermi arcs were recently shown to superconduct at low temperatures where bulk superconductivity is absent. Here, we perform first-principles calculations to investigate in detail the bulk and surface electronic structure of PtBi2, and obtain the spin texture as well as the momentum-dependent localization of the arcs. Motivated by the experimentally observed recovery of inversion symmetry under pressure or upon doping, we interpolate between the two structures and determine the energy and momentum dependence of the Weyl nodes. For deeper insights into the surface superconductivity of PtBi2, we construct a symmetry-adapted effective four-band model that accurately reproduces the Weyl points of PtBi2. We supplement this model with an analysis of the symmetry-allowed pairings between the Fermi arcs, which naturally mix spin-singlet and spin-triplet channels. Moreover, the presence of surface-only superconductivity facilitates an intrinsic superconductor-semimetal-superconductor Josephson junction, with the semimetallic phase sandwiched between the two superconducting surfaces. For a phase difference of , zero-energy Andreev bound states develop between the two terminations.Fil: Vocaturo, Riccardo. Leibniz Institute for Solid State and Materials Research; AlemaniaFil: Koepernik, Klaus. Leibniz Institute for Solid State and Materials Research; AlemaniaFil: Facio, Jorge Ismael. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; ArgentinaFil: Timm, Carsten. Technische Universität Dresden.; AlemaniaFil: Fulga, Ion Cosma. Leibniz Institute for Solid State and Materials Research; AlemaniaFil: Janson, Oleg. Leibniz Institute for Solid State and Materials Research; AlemaniaFil: van den Brink, Jeroen. Leibniz Institute for Solid State and Materials Research; AlemaniaAmerican Physical Society2024-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/264177Vocaturo, Riccardo; Koepernik, Klaus; Facio, Jorge Ismael; Timm, Carsten; Fulga, Ion Cosma; et al.; Electronic structure of the surface-superconducting Weyl semimetal PtBi 2; American Physical Society; Physical Review B; 110; 5; 8-2024; 1-142469-99502469-9969CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.110.054504info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.110.054504info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:53:30Zoai:ri.conicet.gov.ar:11336/264177instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:53:30.862CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
title Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
spellingShingle Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
Vocaturo, Riccardo
WEYL
SEMIMETAL
PTBI2
TOPOLOGICAL
title_short Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
title_full Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
title_fullStr Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
title_full_unstemmed Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
title_sort Electronic structure of the surface-superconducting Weyl semimetal PtBi 2
dc.creator.none.fl_str_mv Vocaturo, Riccardo
Koepernik, Klaus
Facio, Jorge Ismael
Timm, Carsten
Fulga, Ion Cosma
Janson, Oleg
van den Brink, Jeroen
author Vocaturo, Riccardo
author_facet Vocaturo, Riccardo
Koepernik, Klaus
Facio, Jorge Ismael
Timm, Carsten
Fulga, Ion Cosma
Janson, Oleg
van den Brink, Jeroen
author_role author
author2 Koepernik, Klaus
Facio, Jorge Ismael
Timm, Carsten
Fulga, Ion Cosma
Janson, Oleg
van den Brink, Jeroen
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv WEYL
SEMIMETAL
PTBI2
TOPOLOGICAL
topic WEYL
SEMIMETAL
PTBI2
TOPOLOGICAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Trigonal PtBi2 is a layered semimetal without inversion symmetry, featuring 12 Weyl points in the vicinity of the Fermi energy. Its topological Fermi arcs were recently shown to superconduct at low temperatures where bulk superconductivity is absent. Here, we perform first-principles calculations to investigate in detail the bulk and surface electronic structure of PtBi2, and obtain the spin texture as well as the momentum-dependent localization of the arcs. Motivated by the experimentally observed recovery of inversion symmetry under pressure or upon doping, we interpolate between the two structures and determine the energy and momentum dependence of the Weyl nodes. For deeper insights into the surface superconductivity of PtBi2, we construct a symmetry-adapted effective four-band model that accurately reproduces the Weyl points of PtBi2. We supplement this model with an analysis of the symmetry-allowed pairings between the Fermi arcs, which naturally mix spin-singlet and spin-triplet channels. Moreover, the presence of surface-only superconductivity facilitates an intrinsic superconductor-semimetal-superconductor Josephson junction, with the semimetallic phase sandwiched between the two superconducting surfaces. For a phase difference of , zero-energy Andreev bound states develop between the two terminations.
Fil: Vocaturo, Riccardo. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Koepernik, Klaus. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Facio, Jorge Ismael. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; Argentina
Fil: Timm, Carsten. Technische Universität Dresden.; Alemania
Fil: Fulga, Ion Cosma. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: Janson, Oleg. Leibniz Institute for Solid State and Materials Research; Alemania
Fil: van den Brink, Jeroen. Leibniz Institute for Solid State and Materials Research; Alemania
description Trigonal PtBi2 is a layered semimetal without inversion symmetry, featuring 12 Weyl points in the vicinity of the Fermi energy. Its topological Fermi arcs were recently shown to superconduct at low temperatures where bulk superconductivity is absent. Here, we perform first-principles calculations to investigate in detail the bulk and surface electronic structure of PtBi2, and obtain the spin texture as well as the momentum-dependent localization of the arcs. Motivated by the experimentally observed recovery of inversion symmetry under pressure or upon doping, we interpolate between the two structures and determine the energy and momentum dependence of the Weyl nodes. For deeper insights into the surface superconductivity of PtBi2, we construct a symmetry-adapted effective four-band model that accurately reproduces the Weyl points of PtBi2. We supplement this model with an analysis of the symmetry-allowed pairings between the Fermi arcs, which naturally mix spin-singlet and spin-triplet channels. Moreover, the presence of surface-only superconductivity facilitates an intrinsic superconductor-semimetal-superconductor Josephson junction, with the semimetallic phase sandwiched between the two superconducting surfaces. For a phase difference of , zero-energy Andreev bound states develop between the two terminations.
publishDate 2024
dc.date.none.fl_str_mv 2024-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/264177
Vocaturo, Riccardo; Koepernik, Klaus; Facio, Jorge Ismael; Timm, Carsten; Fulga, Ion Cosma; et al.; Electronic structure of the surface-superconducting Weyl semimetal PtBi 2; American Physical Society; Physical Review B; 110; 5; 8-2024; 1-14
2469-9950
2469-9969
CONICET Digital
CONICET
url http://hdl.handle.net/11336/264177
identifier_str_mv Vocaturo, Riccardo; Koepernik, Klaus; Facio, Jorge Ismael; Timm, Carsten; Fulga, Ion Cosma; et al.; Electronic structure of the surface-superconducting Weyl semimetal PtBi 2; American Physical Society; Physical Review B; 110; 5; 8-2024; 1-14
2469-9950
2469-9969
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.110.054504
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.110.054504
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083065968852992
score 13.22299

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