| Texto completo | |
| Autor(es): |
Focassio, Bruno
;
Schleder, Gabriel R.
;
Pezo, Armando
;
Costa, Marcio
;
Fazzio, Adalberto
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 102, n. 4, p. 6-pg., 2020-07-14. |
| Resumo | |
Two-dimensional Na3Bi is a dual topological insulator protected by time-reversal and mirror symmetry, resulting in a promising platform for device design. However, in reality, the design of topological devices is hindered by a sensitivity against disorder and temperature. We study the topological properties of Na3Bi in the presence of intrinsic defects, investigating the robustness of the edge states and the resulting transport properties. We apply a recursive Green's function technique enabling the study of disordered systems with lengths comparable to experimentally synthesized materials, in the order of micrometers. We combine our findings to propose a topological insulator device, where intrinsic defects are used to filter the response of trivial bulk states. This results in a stable conductance throughout a large range of electronic temperatures, and controllable by a perpendicular electric field. Our proposal is general, enabling the design of various dual topological insulator devices. (AU) | |
| Processo FAPESP: | 17/02317-2 - Interfaces em materiais: propriedades eletrônicas, magnéticas, estruturais e de transporte |
| Beneficiário: | Adalberto Fazzio |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/04527-0 - Interface entre isolantes topológicos cristalinos e materiais 2D-trivial: estudo de proximidade via defeitos |
| Beneficiário: | Bruno Focassio |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 16/14011-2 - Propriedades eletrônicas: interfaces entre isolantes topológicos (TI-TI) |
| Beneficiário: | Marcio Jorge Teles da Costa |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 17/18139-6 - Machine learning e Ciência de Materiais: descoberta e design de materiais 2D |
| Beneficiário: | Gabriel Ravanhani Schleder |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |