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arXiv · 1512.02030

Tunable skewed edges in puckered structures

Marko M. Grujić·Motohiko Ezawa·Milan Ž. Tadić·Françios M. Peeters
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Abstract

We propose a new 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.

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Marko M. Grujić, Motohiko Ezawa, Milan Ž. Tadić, Françios M. Peeters. 2016-06-15. Tunable skewed edges in puckered structures. https://doi.org/10.1103/physrevb.93.245413

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