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http://hdl.handle.net/1843/38460| Type: | Tese |
| Title: | Electronic structure of topological materials probed by angle-resolved photoemission spectroscopy |
| Authors: | Pedro Henrique Rezende Gonçalves |
| First Advisor: | Rogério Magalhães Paniago |
| First Co-advisor: | Wendell Simões e Silva |
| First Referee: | Andrés Felipe Santander-Syro |
| Second Referee: | Simone Silva Alexandre |
| Third Referee: | Carolina Parra Gonzalez |
| metadata.dc.contributor.referee4: | Myriano Henriques de Oliveira Junior |
| Abstract: | The 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. |
| Subject: | Estrutura eletrônica Semimetais Fotoemissão Ondas de densidade de carga |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| metadata.dc.publisher.program: | Programa de Pós-Graduação em Física |
| Rights: | Acesso Aberto |
| URI: | http://hdl.handle.net/1843/38460 |
| Issue Date: | 21-Jun-2021 |
| Appears in Collections: | Teses de Doutorado |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| PhD_Thesis_Pedro.pdf | Tese de Doutorado - Pedro Henrique Rezende Gonçalves | 3.84 MB | Adobe PDF | View/Open |
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