Tunable skewed edges in puckered structures

Tunable skewed edges in puckered structures

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...

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Veröffentlicht in:Physical review. B 2016-06, Vol.93 (24), Article 245413
Hauptverfasser: Grujić, Marko M., Ezawa, Motohiko, Tadić, Milan Ž., Peeters, François M.
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Sprache:eng
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Band structure of solids
Condensed matter
Electric fields
Field effect transistors
Honeycomb
Metal-insulator transition
Nanostructure
Topology
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container_issue 24
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creator Grujić, Marko M.
Ezawa, Motohiko
Tadić, Milan Ž.
Peeters, François M.
description 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 sub(z). A topological argument is presented, revealing the condition for the emergence of such edge states.
doi_str_mv 10.1103/PhysRevB.93.245413
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subjects Band structure of solids
Condensed matter
Electric fields
Field effect transistors
Honeycomb
Metal-insulator transition
Nanostructure
Topology
title Tunable skewed edges in puckered structures
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