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Tunable skewed edges in puckered structures

机译：褶皱结构中的可调偏斜边缘

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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.
机译：我们提出一种边缘类型，该边缘类型是由于蜂窝系统的褶皱结构（例如磷光体）中固有的各向异性而引起的。倾斜的锯齿形和倾斜的扶手椅纳米带分别是半导体的和金属的，与它们的正常边缘对应物相反。它们的能带结构是可调的，并且电场会引起金属-绝缘体的跃迁。我们基于歪斜扶手椅纳米带中的边缘状态预测了场效应晶体管，其中通过施加任意小的电场E_z来消除边缘状态。提出了拓扑论证，揭示了这种边缘状态出现的条件。

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  • 来源
    《Physical review》 |2016年第24期|245413.1-245413.7|共7页
  • 作者

    Marko M. Grujic; Motohiko Ezawa; Milan Z. Tadic; Francois M. Peeters;

  • 作者单位

    School of Electrical Engineering, University of Belgrade, P.O. Box 3554, 11120 Belgrade, Serbia,Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;

    Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan;

    School of Electrical Engineering, University of Belgrade, P.O. Box 3554, 11120 Belgrade, Serbia;

    Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;

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