Issue 7, 2019

Valley polarization and ferroelectricity in a two-dimensional GaAsC6 monolayer

Abstract

Valley polarization and ferroelectricity are the two basic concepts in electronic device applications. However, the coexistence of these two scenarios in one material has not been reported. Here, using first-principles calculations, we demonstrated that the two-dimensional GaAsC6 monolayer which is a hybrid structure of GaAs and graphene has a pair of inequivalent valleys with opposite Berry curvatures and an intrinsic out-of-plane spontaneous electric polarization. It also has a direct band gap of about 1.937 eV and a high carrier mobility of about 1.80 × 105 cm2 V−1 s−1, which are promising for electronic device applications. The integration of valley polarization and ferroelectricity in a single material offers a promising platform for the design of electronic devices.

Graphical abstract: Valley polarization and ferroelectricity in a two-dimensional GaAsC6 monolayer

Article information

Article type
Paper
Submitted
05 Dec 2018
Accepted
17 Jan 2019
First published
18 Jan 2019

Phys. Chem. Chem. Phys., 2019,21, 3954-3959

Valley polarization and ferroelectricity in a two-dimensional GaAsC6 monolayer

X. Ma, H. Ai, H. Gao, X. Zhang, W. Li and M. Zhao, Phys. Chem. Chem. Phys., 2019, 21, 3954 DOI: 10.1039/C8CP07444E

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