中国物理B ›› 2015, Vol. 24 ›› Issue (3): 36301-036301.doi: 10.1088/1674-1056/24/3/036301

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Two-dimensional arsenic monolayer sheet predicted from first-principles

濮春英a, 叶小涛b, 蒋华龙a, 张飞武c d, 卢志文a, 何俊宝a, 周大伟a   

  1. a College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China;
    b College of Computer Science and Technology, Henan Polytechnic University, Jiaozuo 454000, China;
    c Nanochemistry Research Institute, Curtin University, Perth, WA-6845, Australia;
    d State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
  • 收稿日期:2014-08-12 修回日期:2014-09-28 出版日期:2015-03-05 发布日期:2015-03-05
  • 基金资助:

    Projected supported by the Henan Joint Funds of the National Natural Science Foundation of China (Grant Nos. U1304612 and U1404608), the National Natural Science Foundation of China (Grant Nos. 51374132 and 11404175), the Special Fund for Theoretical Physics of China (Grant No. 11247222), and Nanyang Normal University Science Foundation, China (Grant Nos. ZX2012018 and ZX2013019).

Two-dimensional arsenic monolayer sheet predicted from first-principles

Pu Chun-Ying (濮春英)a, Ye Xiao-Tao (叶小涛)b, Jiang Hua-Long (蒋华龙)a, Zhang Fei-Wu (张飞武)c d, Lu Zhi-Wen (卢志文)a, He Jun-Bao (何俊宝)a, Zhou Da-Wei (周大伟)a   

  1. a College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China;
    b College of Computer Science and Technology, Henan Polytechnic University, Jiaozuo 454000, China;
    c Nanochemistry Research Institute, Curtin University, Perth, WA-6845, Australia;
    d State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
  • Received:2014-08-12 Revised:2014-09-28 Online:2015-03-05 Published:2015-03-05
  • Contact: Zhou Da-Wei E-mail:zhoudawei@nynu.edu.cn
  • Supported by:

    Projected supported by the Henan Joint Funds of the National Natural Science Foundation of China (Grant Nos. U1304612 and U1404608), the National Natural Science Foundation of China (Grant Nos. 51374132 and 11404175), the Special Fund for Theoretical Physics of China (Grant No. 11247222), and Nanyang Normal University Science Foundation, China (Grant Nos. ZX2012018 and ZX2013019).

摘要:

Using first-principles calculations, we investigate the two-dimensional arsenic nanosheet isolated from bulk gray arsenic. Its dynamical stability is confirmed by phonon calculations and molecular dynamics analyzing. The arsenic sheet is an indirect band gap semiconductor with a band gap of 2.21 eV in the hybrid HSE06 functional calculations. The valence band maximum (VBM) and the conduction band minimum (CBM) are mainly occupied by the 4p orbitals of arsenic atoms, which is consistent with the partial charge densities of VBM and CBM. The charge density of the VBM G point has the character of a π bond, which originates from p orbitals. Furthermore, tensile and compressive strains are applied in the armchair and zigzag directions, related to the tensile deformations of zigzag and armchair nanotubes, respectively. We find that the ultimate strain in zigzag deformation is 0.13, smaller than 0.18 of armchair deformation. The limit compressive stresses of single-layer arsenic along armchair and zigzag directions are -4.83 GPa and -4.76 GPa with corresponding strains of -0.15 and -0.14, respectively.

关键词: arsenic sheet, hybrid density functional, strain

Abstract:

Using first-principles calculations, we investigate the two-dimensional arsenic nanosheet isolated from bulk gray arsenic. Its dynamical stability is confirmed by phonon calculations and molecular dynamics analyzing. The arsenic sheet is an indirect band gap semiconductor with a band gap of 2.21 eV in the hybrid HSE06 functional calculations. The valence band maximum (VBM) and the conduction band minimum (CBM) are mainly occupied by the 4p orbitals of arsenic atoms, which is consistent with the partial charge densities of VBM and CBM. The charge density of the VBM G point has the character of a π bond, which originates from p orbitals. Furthermore, tensile and compressive strains are applied in the armchair and zigzag directions, related to the tensile deformations of zigzag and armchair nanotubes, respectively. We find that the ultimate strain in zigzag deformation is 0.13, smaller than 0.18 of armchair deformation. The limit compressive stresses of single-layer arsenic along armchair and zigzag directions are -4.83 GPa and -4.76 GPa with corresponding strains of -0.15 and -0.14, respectively.

Key words: arsenic sheet, hybrid density functional, strain

中图分类号:  (First-principles theory)

  • 63.20.dk
63.20.D- (Phonon states and bands, normal modes, and phonon dispersion) 62.25.-g (Mechanical properties of nanoscale systems)