Tunable skewed edges in puckered structures

Article

关键词: BLACK PHOSPHORUS;    NANORIBBONS;    STATE;    SEMICONDUCTOR;    MOBILITY;    BAND;   

DOI  :  10.1103/PhysRevB.93.245413

来源: SCIE

【 摘 要 】

We propose a type of edges arising due to the anisotropy inherent in the puckered structure of a honeycomb system such as in phosphorene. Skewed-zigzag and skewed-armchair nanoribbons are semiconducting and metallic, respectively, in contrast to their normal edge counterparts. Their band structures are tunable, and a metal-insulator transition is induced by an electric field. We predict a field-effect transistor based on the edge states in skewed-armchair nanoribbons, where the edge state is gapped by applying arbitrary small electric field E-z. A topological argument is presented, revealing the condition for the emergence of such edge states.

【 授权许可】

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