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Valley-selective circular dichroism and high carrier mobility of graphene-like BC6N

Abstract

The two-dimensional (2D) hybrid structures of boron nitride (BN) and graphene with properties superior to the individuals are long desired. In this work, we demonstrate theoretically that this goal can be reached in a new graphene-like borocarbonitride (g-BC6N) whose domain has been synthesized in recent experiments. It has a direct band gap of 1.833 eV and high carrier mobility comparable to that of black phosphorene. The inversion symmetry breaking in g-BC6N leads to a pair of inequivalent valleys with opposite Berry curvatures in the vicinities of the vertices (K and K’) of Brillouin zone. The coexistence of valley-selective circular dichroism and high carrier mobility in g-BNC6 is beneficial to realize valley Hall effect. We also propose a tight-binding (TB) model to describe the intrinsic features of this type of lattices, revealing a new class of 2D valleytronics materials.

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Publication details

The article was received on 17 Apr 2018, accepted on 12 Jun 2018 and first published on 13 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR03080D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Valley-selective circular dichroism and high carrier mobility of graphene-like BC6N

    X. Liu, X. Ma, H. Gao, X. Zhang, H. Ai, W. Li and M. Zhao, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR03080D

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