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- W3048220272 abstract "α-Sn is on the boundary of a couple of distinct topological phases. It will transform into a topological insulator under a suitable strain. However, a clear picture of its topological surface states (TSSs) is still lacking. Here we perform first-principles calculations on the electronic structure of α-Sn(111) surface to identify its TSSs and reveal their properties. The results show that the presence of valence band reorganizes the TSSs in the inverted sp gap into two Dirac cones. The lower one is in the valence band continuum; the upper one resides in the gap between the valence and conduction bands. We also demonstrate the transformation of the surface states by switching on or off of strain and/or spin-orbit coupling. Without spin-orbit coupling, only the TSSs associated with the lower Dirac cone survive, and they are spin unpolarized. The results are useful for understanding and engineering the topological properties of α-Sn." @default.
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- W3048220272 date "2020-10-01" @default.
- W3048220272 modified "2023-09-23" @default.
- W3048220272 title "First-principles study of the topological surface states of α-Sn(111)" @default.
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- W3048220272 doi "https://doi.org/10.1016/j.physleta.2020.126782" @default.
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