Pressure-induced topological quantum phase transition in Sb2Se3

Article

关键词: SINGLE DIRAC CONE;    INSULATOR;    SURFACE;    BI2TE3;    SCHEMES;    STATES;    WELLS;   

DOI  :  10.1103/PhysRevB.89.035101

来源: SCIE

【 摘 要 】

Based on the first-principles band structure calculations, we investigate the effects of hydrostatic pressure on the conventional insulator (CI) Sb2Se3 and predict that it undergoes a topological quantum phase transition from a CI to a nontrivial topological insulator at a critical pressure value. The pressure-induced topological quantum phase transition is confirmed by calculating the evolution of the bulk energy gap as a function of pressure, the inversion of energy band structure, and the Z(2) topological invariant, as well as the existence of the Dirac-like topological surface states. Our predictions can be tested by both spectroscopy and transport experiments.

【 授权许可】

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