Bulk and Surface Electronic Structure of the Dual-Topology Semimetal Pt2HgSe3
| Autor: | Cucchi, I., Marrazzo, A., Cappelli, E., Riccò, S., Bruno, F. Y., Lisi, S., Hoesch, M., Kim, T. K., Cacho, C., Besnard, C., Giannini, E., Marzari, N., Gibertini, M., Baumberger, F., Tamai, A. |
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| Přispěvatelé: | Cucchi, I., Marrazzo, A., Cappelli, E., Ricco, S., Bruno, F. Y., Lisi, S., Hoesch, M., Kim, T. K., Cacho, C., Besnard, C., Giannini, E., Marzari, N., Gibertini, M., Baumberger, F., Tamai, A. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
topological insulator
Condensed Matter - Materials Science Jacutingaite ARPES Chern number crystalline topology first-principle simulations DFT spin-orbit coupling Zak phase Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences ddc:500.2 insulator state first-principle simulation ddc:530 phase |
| Zdroj: | Physical Review Letters, Vol. 124, No 106402 (2020) Physical review letters 124(10), 106402 (1-6) (2020). doi:10.1103/PhysRevLett.124.106402 |
| ISSN: | 0031-9007 |
| Popis: | Physical review letters 124(10), 106402 (1-6) (2020). doi:10.1103/PhysRevLett.124.106402 We report high-resolution angle-resolved photoemission measurements on single crystals of Pt$_2$HgSe$_3$ grown by high-pressure synthesis. Our data reveal a gapped Dirac nodal line whose (001) projection separates the surface Brillouin zone in topological and trivial areas. In the nontrivial k-space range, we find surface states with multiple saddle points in the dispersion, resulting in two van Hove singularities in the surface density of states. Based on density-functional theory calculations, we identify these surface states as signatures of a topological crystalline state, which coexists with a weak topological phase. Published by APS, College Park, Md. |
| Databáze: | OpenAIRE |
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