Magnetic interactions of 4f electrons in the topological insulator chalcogenide Bi2Se3

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Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversität Stuttgart-
Autor(es): dc.contributorLos Alamos National Laboratory-
Autor(es): dc.creatorSouza, J. C.-
Autor(es): dc.creatorCarlone, M.-
Autor(es): dc.creatorLesseux, G. G.-
Autor(es): dc.creatorPizzi, H. B.-
Autor(es): dc.creatorFreitas, G. S.-
Autor(es): dc.creatorUrbano, R. R.-
Autor(es): dc.creatorVenegas, P. A.-
Autor(es): dc.creatorPagliuso, P. G.-
Data de aceite: dc.date.accessioned2025-08-21T18:50:20Z-
Data de disponibilização: dc.date.available2025-08-21T18:50:20Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.106.235109-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246450-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246450-
Descrição: dc.descriptionThe gap-opening mechanism of a topological insulator, the quantum anomalous Hall effect, and the axion physics are still pressing open questions, and a microscopic viewpoint to further understand the role of magnetism in topology is highly desirable. In this work we have performed a microscopic investigation, by means of electron spin resonance (ESR) along with complementary bulk measurements, on the chalcogenide (Bi1-xGdx)2Se3 (x=0, 0.001, 0.002 and 0.006). Our analysis of the Gd3+ spin dynamics reveals no significant change of the Fermi surface as a function of Gd3+ concentration, which indicates that the 4f magnetism is different from the nonlocal effects induced by transition metal (d electrons) substitutions. Additionally, we observe an unusual evolution of the Gd3+ ESR spectra as a function of the applied magnetic field, which we discuss considering the magnetic interaction between Gd3+4f electrons and impurity centers such as Se vacancies. This interaction would give rise to a local weak antilocalization effect surrounding the Gd3+ ions. Such a mechanism is observable due to particular details of the Gd3+4f electrons' magnetism in this system compared to that of d electrons. Our work points out that rare-earth substitutions in this model topological insulator are a promising path to explore the axion insulating systems.-
Descrição: dc.descriptionInstituto de Física Gleb Wataghin UNICAMP, Sãu Paulo-
Descrição: dc.descriptionPOSMAT Faculdade de Ciências UNESP, Caixa Postal 473, Sãu Paulo-
Descrição: dc.description1. Physikalisches Institut Universität Stuttgart-
Descrição: dc.descriptionLos Alamos National Laboratory-
Descrição: dc.descriptionDepartamento de Física Faculdade de Ciências UNESP, Caixa Postal 473, Sãu Paulo-
Descrição: dc.descriptionPOSMAT Faculdade de Ciências UNESP, Caixa Postal 473, Sãu Paulo-
Descrição: dc.descriptionDepartamento de Física Faculdade de Ciências UNESP, Caixa Postal 473, Sãu Paulo-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review B-
???dc.source???: dc.sourceScopus-
Título: dc.titleMagnetic interactions of 4f electrons in the topological insulator chalcogenide Bi2Se3-
Tipo de arquivo: dc.typelivro digital-
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