| Texto completo | |
| Autor(es): |
Souza, J. C.
;
Crivillero, M. V. Ale
;
Dawczak-Debicki, H.
;
Ptok, Andrzej
;
Pagliuso, P. G.
;
Wirth, S.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 108, n. 16, p. 15-pg., 2023-10-31. |
| Resumo | |
Half-Heusler systems host a plethora of different ground states, especially with nontrivial topology. However, there is still a lack of spectroscopic insight into the corresponding band inversion in this family. In this work, we locally explore the half-Heuslers YTBi (T = Pt and Pd) by means of scanning tunneling microscopy/spectroscopy. From our analysis of the (120) surface plane, we infer that the increase of the spin-orbit coupling upon going from Pd to Pt is the main player in tuning the surface states from trivial to topologically nontrivial. Our measurements unveil a (2 x 1) reconstruction of the (120) surface of both systems. Using density functional theory calculations, we show that the observed different behavior of the local density of states near the Fermi level in these two materials is directly related to the presence of metallic surface states. Our work sheds new light on a well known tunable family of materials and opens new routes to explore the presence of topological states of matter in half-Heusler systems and its microscopic observation. (AU) | |
| Processo FAPESP: | 20/12283-0 - Microscopia de varredura de tunelamento em compostos com topologia não-trivial |
| Beneficiário: | Jean Carlo Souza |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 17/10581-1 - Fenômenos emergentes em sistemas de dimensões reduzidas |
| Beneficiário: | Pascoal Jose Giglio Pagliuso |
| Modalidade de apoio: | Auxílio à Pesquisa - Projetos Especiais |
| Processo FAPESP: | 18/11364-7 - Propriedades magnéticas de sistemas complexos com topologia não-trivial |
| Beneficiário: | Jean Carlo Souza |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |