Electronic structure of topological materials probed by angle-resolved photoemission spectroscopy

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dc.creatorPedro Henrique Rezende Gonçalves
dc.date.accessioned2021-10-21T13:19:35Z
dc.date.accessioned2025-09-08T23:14:04Z
dc.date.available2021-10-21T13:19:35Z
dc.date.issued2021-06-21
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.identifier.urihttps://hdl.handle.net/1843/38460
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relationPrograma Institucional de Internacionalização – CAPES - PrInt
dc.rightsAcesso Aberto
dc.subjectEstrutura eletrônica
dc.subjectSemimetais
dc.subjectFotoemissão
dc.subjectOndas de densidade de carga
dc.subject.otherTopological insulators
dc.subject.otherWeyl semimetals
dc.subject.otherCharge-density waves
dc.subject.otherAngle-resolved photoemission spectroscopy
dc.titleElectronic structure of topological materials probed by angle-resolved photoemission spectroscopy
dc.typeTese de doutorado
local.contributor.advisor-co1Wendell Simões e Silva
local.contributor.advisor1Rogério Magalhães Paniago
local.contributor.advisor1Latteshttp://lattes.cnpq.br/7447944106455097
local.contributor.referee1Andrés Felipe Santander-Syro
local.contributor.referee1Simone Silva Alexandre
local.contributor.referee1Carolina Parra Gonzalez
local.contributor.referee1Myriano Henriques de Oliveira Junior
local.creator.Latteshttp://lattes.cnpq.br/2572462775582499
local.description.resumoThe research in topological materials had been an extensive source for prediction and observation of new and exotic phenomena at the condensed matter level. During the last 20 years, a variety of new topological phases of matter had emerged. The most prominent are Topological Insulators and Weyl Semimetals. In this thesis, we used Angle-resolved Photoemission Spectroscopy to characterize the electronic structure of two topological materials: the quaternary topological insulator BiSbSe2.5Te0.5 and the topological Weyl semimetal candidate TaTe4. We reported the realization of a stable quaternary topological insulator, BiSbSe2.5Te0.5, characterized by a positive doping and charge carriers with smaller effective mass when compared with Bi2Se3. About TaTe4, we report a 2D Fermi surface composed by four Dirac/Weyl cones in the surface first Brillouin zone. The electronic structure of these metallic states is compatible with previous findings in the literature, showing a coexistence of CDW and topological features in a 2D Fermi surface.
local.identifier.orcidhttps://orcid.org/ 0000-0001-6773-8921
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.publisher.programPrograma de Pós-Graduação em Física

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