Topology of chalcogen chains
| Autor: | Kłosiński, Adam, Brzezicki, Wojciech, Lau, Alexander, Agrapidis, Cliò E., Oleś, Andrzej M., van Wezel, Jasper, Wohlfeld, Krzysztof |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Phys. Rev. B. 107, 125123 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.125123 |
| Popis: | We investigate the topological properties of the helical atomic chains occurring in elemental selenium and tellurium. We postulate a realistic model that includes spin-orbit interaction and show this to be topologically non-trivial, with a topological invariant protected by a crystalline symmetry. We describe the end-states, which are orbitally polarized, with an orbital density modulation strongly peaked at the edge. Furthermore, we propose a simplified model that decomposes into three orbital chains, allowing us to define a topological invariant protected by a crystalline symmetry. We contrast this result with recent observations made for the orbital Su-Schrieffer-Heeger model containing a $p$-orbital zigzag chain. Comment: 10 figures |
| Databáze: | arXiv |
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