Engineering the topological surface states in the (Sb-2)(m)-Sb2Te3 (m=0-3) superlattice series

Article

关键词: SINGLE DIRAC CONE;    INSULATORS;    SB2TE3;    BI2SE3;    BI2TE3;   

DOI  :  10.1103/PhysRevB.91.201101

来源: SCIE

【 摘 要 】

We investigate the evolution of both the occupied and unoccupied electronic structure in representative compounds of the infinitely adaptive superlattice series (Sb-2)(m)-Sb2Te3 (m = 0-3) by means of angle-resolved photoemission spectroscopy and time-delayed two-photon photoemission, combined with first-principles band-structure calculations. We discover that the topological nature of the surface states and their spin texture are robust, with dispersions evolving from linear (Dirac-like) to parabolic (Rashba-like) along the series, as the materials evolve from semiconductors to semimetals. Our findings provide a promising strategy for engineering the topological states with the desired flexibility needed for realizing different quantum phenomena and spintronics applications.

【 授权许可】

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