Tailoring topological states of core-shell nanoparticles

In this work we investigate novel spherical core-shell nanoparticles with band inversion. The core and the embedding medium are normal semiconductors while the shell material is assumed to be a topological insulator. The envelope functions are found to satisfy a Dirac-like equation that can be solve...

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Authors: Martínez Strasser, Carolina, Baba, Yuriko Caterina, Díaz Fernández, Álvaro, Domínguez-Adame Acosta, Francisco
Format: article
Publication Date:2022
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/72448
Online Access:https://hdl.handle.net/20.500.14352/72448
Access Level:Open access
Keyword:538.9
Semiconductor
Gap
Heterojunctions
Supersymmetry
Pb_(1-X)SN_(X)Te
Core-shell nanoparticles
Surface states
Topological insulator
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
id ES_8b291dbb76cb92dfc12a94ff7c2e53d4
oai_identifier_str oai:docta.ucm.es:20.500.14352/72448
network_acronym_str ES
network_name_str España
repository_id_str
spelling Tailoring topological states of core-shell nanoparticlesMartínez Strasser, CarolinaBaba, Yuriko CaterinaDíaz Fernández, ÁlvaroDomínguez-Adame Acosta, Francisco538.9SemiconductorGapHeterojunctionsSupersymmetryPb_(1-X)SN_(X)TeCore-shell nanoparticlesSurface statesTopological insulatorFísica de materialesFísica del estado sólido2211 Física del Estado SólidoIn this work we investigate novel spherical core-shell nanoparticles with band inversion. The core and the embedding medium are normal semiconductors while the shell material is assumed to be a topological insulator. The envelope functions are found to satisfy a Dirac-like equation that can be solved in a closed form. The core-shell nanoparticle supports midgap bound states located at both interfaces due to band inversion. These states are robust since they are topologically protected. The energy spectrum presents mirror symmetry due to the chiral symmetry of the Dirac-like Hamiltonian. As a major result, we show that the thickness of the shell acts as an additional parameter for the fine tuning of the energy levels, which paves the way for electronics and optoelectronics applications.Elsevier Science BVUniversidad Complutense de Madrid20222022-02-0120222022-02-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/72448reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/724482026-06-02T12:44:21Z
dc.title.none.fl_str_mv Tailoring topological states of core-shell nanoparticles
title Tailoring topological states of core-shell nanoparticles
spellingShingle Tailoring topological states of core-shell nanoparticles
Martínez Strasser, Carolina
538.9
Semiconductor
Gap
Heterojunctions
Supersymmetry
Pb_(1-X)SN_(X)Te
Core-shell nanoparticles
Surface states
Topological insulator
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
title_short Tailoring topological states of core-shell nanoparticles
title_full Tailoring topological states of core-shell nanoparticles
title_fullStr Tailoring topological states of core-shell nanoparticles
title_full_unstemmed Tailoring topological states of core-shell nanoparticles
title_sort Tailoring topological states of core-shell nanoparticles
dc.creator.none.fl_str_mv Martínez Strasser, Carolina
Baba, Yuriko Caterina
Díaz Fernández, Álvaro
Domínguez-Adame Acosta, Francisco
author Martínez Strasser, Carolina
author_facet Martínez Strasser, Carolina
Baba, Yuriko Caterina
Díaz Fernández, Álvaro
Domínguez-Adame Acosta, Francisco
author_role author
author2 Baba, Yuriko Caterina
Díaz Fernández, Álvaro
Domínguez-Adame Acosta, Francisco
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Semiconductor
Gap
Heterojunctions
Supersymmetry
Pb_(1-X)SN_(X)Te
Core-shell nanoparticles
Surface states
Topological insulator
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Semiconductor
Gap
Heterojunctions
Supersymmetry
Pb_(1-X)SN_(X)Te
Core-shell nanoparticles
Surface states
Topological insulator
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
description In this work we investigate novel spherical core-shell nanoparticles with band inversion. The core and the embedding medium are normal semiconductors while the shell material is assumed to be a topological insulator. The envelope functions are found to satisfy a Dirac-like equation that can be solved in a closed form. The core-shell nanoparticle supports midgap bound states located at both interfaces due to band inversion. These states are robust since they are topologically protected. The energy spectrum presents mirror symmetry due to the chiral symmetry of the Dirac-like Hamiltonian. As a major result, we show that the thickness of the shell acts as an additional parameter for the fine tuning of the energy levels, which paves the way for electronics and optoelectronics applications.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-02-01
2022
2022-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/72448
url https://hdl.handle.net/20.500.14352/72448
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 Elsevier Science BV
publisher.none.fl_str_mv Elsevier Science BV
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869412787732611072
score 15,300719

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