Study of Spin-Orbit Coupling Effect on Bismuth (111) Bilayer

• Authors: M. Bieniek , T. Woźniak , P. Potasz
• Languages of publication: EN

Abstracts

EN

Band inversion process in Bi(111) bilayer is studied using many-orbital tight-binding model, supported by the density-functional theory calculations, with a controllable spin-orbit coupling constant in tight-binding model. This effect is important in order to verify a topological nature of this material. We show that after closing of the energy gap leading to crossing of the valence and conduction bands, the second band inversion occurs within a valence band. We analyze orbital composition and spin textures of bands within different regimes. Around a Γ point, all spins align in one direction before the first band inversion. Moreover, a change of signs for some spin components after a band inversion is noticed. After the second band inversion, a significant change of orbital contribution of the top of the valence band is observed.

Keywords

EN

73.22.Dj; 74.20.Pq

Discipline

• 73.22.Dj: Single particle states
• 74.20.Pq: Electronic structure calculations(for methods of electronic structure calculations, see 71.15.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 2
• Pages: 609-612

Dates

published

2016-08

Contributors

author

M. Bieniek

• Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, PL-50-370 Wrocław, Poland

author

T. Woźniak

• Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, PL-50-370 Wrocław, Poland

author

P. Potasz

• Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, PL-50-370 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.130.609