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Issue 15, 2017
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Intrinsic point defects in buckled and puckered arsenene: a first-principles study

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Abstract

Using first-principles calculations, we study the structural, energetic, and electronic properties of various point defects in arsenene. Stone–Wales defects are found to be thermodynamically favorable and are predicted to be stable at room temperature. Defects are found to significantly influence the electronic properties in buckled phase. In particular, single vacancies generate gap states whereas strain induced states close to the valence and conduction band edges are observed for Stone–Wales and di-vacancy defects. The computed band structures of di-vacancy defects in puckered phase are less disturbed compared to the corresponding band structures in the buckled one. The influence of a hydrogen-rich atmosphere on the electronic properties of defective arsenene is also investigated. Hydrogen termination of mono/di-vacancies is an exothermic process which removes all defect induced gap states.

Graphical abstract: Intrinsic point defects in buckled and puckered arsenene: a first-principles study

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Article information


Submitted
03 Jan 2017
Accepted
20 Mar 2017
First published
20 Mar 2017

Phys. Chem. Chem. Phys., 2017,19, 9862-9871
Article type
Paper

Intrinsic point defects in buckled and puckered arsenene: a first-principles study

K. Iordanidou, J. Kioseoglou, V. V. Afanas’ev, A. Stesmans and M. Houssa, Phys. Chem. Chem. Phys., 2017, 19, 9862
DOI: 10.1039/C7CP00040E

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