Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures

Intrinsic magnetic topological insulators, in which magnetism and topology are inherently combined, are excellent systems to realize exotic phenomena such as the quantum anomalous Hall effect. However, there are many reports that show that the experimental samples are not so ideal and the effect of...

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Autores: Fukushima, R., Antonov, V. N., Otrokov, M. M., Sasaki, T. T., Akiyama, R., Sumida, K., Ishihara, K., Ichinokura, S., Tanaka, K., Takeda, Y., Salinas, D. P., Eremeev, S. V., Chulkov, E. V., Ernst, A., Hirahara, T.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2024
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:144880
Acceso en línea:http://zaguan.unizar.es/record/144880
Access Level:acceso abierto
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spelling Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructuresFukushima, R.Antonov, V. N.Otrokov, M. M.Sasaki, T. T.Akiyama, R.Sumida, K.Ishihara, K.Ichinokura, S.Tanaka, K.Takeda, Y.Salinas, D. P.Eremeev, S. V.Chulkov, E. V.Ernst, A.Hirahara, T.Intrinsic magnetic topological insulators, in which magnetism and topology are inherently combined, are excellent systems to realize exotic phenomena such as the quantum anomalous Hall effect. However, there are many reports that show that the experimental samples are not so ideal and the effect of the unintentional disorder in these systems needs to be considered carefully. In this study, we investigate the role of misplaced magnetic atoms as well as nonmagnetic elements in the intrinsic magnetic topological insulator heterostructures based on MnBi2⁢Se4 and Bi2⁢Se3. We find that Mn atoms are not only placed at the central layer of the MnBi2⁢Se4 septuple layer (SL) but also intermix with Bi (antisite Mn) as well as reside in the van der Waals (vdW) gap. Through a detailed comparison between the experimental and theoretical x-ray magnetic circular dichroism (XMCD) spectra, we find that the antisite Mn is coupled ferromagnetically, whereas the vdW Mn couple antiferromagnetically to the Mn in the central atomic plane of the SL. Furthermore, we detect a clear XMCD signal in nonmagnetic Se, providing unambiguous evidence of its magnetic interaction with Mn.2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://zaguan.unizar.es/record/144880reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-Sinfo:eu-repo/grantAgreement/ES/MICINN-AEI/PRTR-C17.I1info:eu-repo/grantAgreement/ES/MICINN/PID2022-138210NB-I00info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1448802026-05-29T13:59:51Z
dc.title.none.fl_str_mv Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
title Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
spellingShingle Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
Fukushima, R.
title_short Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
title_full Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
title_fullStr Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
title_full_unstemmed Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
title_sort Direct evidence of induced magnetic moment in Se and the role of misplaced Mn in MnBi2Se4-based intrinsic magnetic topological insulator heterostructures
dc.creator.none.fl_str_mv Fukushima, R.
Antonov, V. N.
Otrokov, M. M.
Sasaki, T. T.
Akiyama, R.
Sumida, K.
Ishihara, K.
Ichinokura, S.
Tanaka, K.
Takeda, Y.
Salinas, D. P.
Eremeev, S. V.
Chulkov, E. V.
Ernst, A.
Hirahara, T.
author Fukushima, R.
author_facet Fukushima, R.
Antonov, V. N.
Otrokov, M. M.
Sasaki, T. T.
Akiyama, R.
Sumida, K.
Ishihara, K.
Ichinokura, S.
Tanaka, K.
Takeda, Y.
Salinas, D. P.
Eremeev, S. V.
Chulkov, E. V.
Ernst, A.
Hirahara, T.
author_role author
author2 Antonov, V. N.
Otrokov, M. M.
Sasaki, T. T.
Akiyama, R.
Sumida, K.
Ishihara, K.
Ichinokura, S.
Tanaka, K.
Takeda, Y.
Salinas, D. P.
Eremeev, S. V.
Chulkov, E. V.
Ernst, A.
Hirahara, T.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
description Intrinsic magnetic topological insulators, in which magnetism and topology are inherently combined, are excellent systems to realize exotic phenomena such as the quantum anomalous Hall effect. However, there are many reports that show that the experimental samples are not so ideal and the effect of the unintentional disorder in these systems needs to be considered carefully. In this study, we investigate the role of misplaced magnetic atoms as well as nonmagnetic elements in the intrinsic magnetic topological insulator heterostructures based on MnBi2⁢Se4 and Bi2⁢Se3. We find that Mn atoms are not only placed at the central layer of the MnBi2⁢Se4 septuple layer (SL) but also intermix with Bi (antisite Mn) as well as reside in the van der Waals (vdW) gap. Through a detailed comparison between the experimental and theoretical x-ray magnetic circular dichroism (XMCD) spectra, we find that the antisite Mn is coupled ferromagnetically, whereas the vdW Mn couple antiferromagnetically to the Mn in the central atomic plane of the SL. Furthermore, we detect a clear XMCD signal in nonmagnetic Se, providing unambiguous evidence of its magnetic interaction with Mn.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/144880
url http://zaguan.unizar.es/record/144880
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S
info:eu-repo/grantAgreement/ES/MICINN-AEI/PRTR-C17.I1
info:eu-repo/grantAgreement/ES/MICINN/PID2022-138210NB-I00
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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