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Computational prediction of the electronic structure and optical properties of graphene-like β-CuN3. 2015
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Computational Centre for Molecular Science, Institute of New Energy Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China. zhouzhen@nankai.edu.cn.
Recently, a new polymorph of the highly energetic phase β-CuN3 has been synthesized. By hybrid density functional computations, we investigated the structural, electronic and optical properties of β-CuN3 bulk and layers. Due to the quantum confinement effect, the band gap of the monolayer (2.39 eV) is larger than that of the bulk (2.23 eV). The layer number affects the configuration and the band gap. β-CuN3 shows both ionic and covalent characters, and could be stable in the infrared and visible spectrum and would decompose under ultraviolet light. The results imply that bulk β-CuN3 could be used as an energetic material.
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