中国物理B ›› 2017, Vol. 26 ›› Issue (12): 126105-126105.doi: 10.1088/1674-1056/26/12/126105

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

Mechanical, elastic, anisotropy, and electronic properties of monoclinic phase of m-SixGe3-xN4

Zhen-Yang Ma(马振洋), Fang Yan(阎芳), Su-Xin Wang(王苏鑫), Qiong-Qiong Jia(贾琼琼), Xin-Hai Yu(于新海), Chun-Lei Shi(史春蕾)   

  1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China
  • 收稿日期:2017-08-08 修回日期:2017-09-06 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: Zhen-Yang Ma E-mail:zyma@cauc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61601468), the Fundamental Research Funds for the Central Universities, China (Grant No. 3122014C024), and the Fund for Scholars of Civil Aviation University of China (Grant No. 2013QD06X).

Mechanical, elastic, anisotropy, and electronic properties of monoclinic phase of m-SixGe3-xN4

Zhen-Yang Ma(马振洋), Fang Yan(阎芳), Su-Xin Wang(王苏鑫), Qiong-Qiong Jia(贾琼琼), Xin-Hai Yu(于新海), Chun-Lei Shi(史春蕾)   

  1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China
  • Received:2017-08-08 Revised:2017-09-06 Online:2017-12-05 Published:2017-12-05
  • Contact: Zhen-Yang Ma E-mail:zyma@cauc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61601468), the Fundamental Research Funds for the Central Universities, China (Grant No. 3122014C024), and the Fund for Scholars of Civil Aviation University of China (Grant No. 2013QD06X).

摘要: The structural, mechanical, elastic anisotropic, and electronic properties of the monoclinic phase of m-Si3N4, m-Si2GeN4, m-SiGe2N4, and m-Ge3N4 are systematically investigated in this work. The calculated results of lattice parameters, elastic constants and elastic moduli of m-Si3N4 and m-Ge3N4 are in good agreement with previous theoretical results. Using the Voigt-Reuss-Hill method, elastic properties such as bulk modulus B and shear modulus G are investigated. The calculated ratio of B/G and Poisson's ratio v show that only m-SiGe2N4 should belong to a ductile material in nature. In addition, m-SiGe2N4 possesses the largest anisotropic shear modulus, Young's modulus, Poisson's ratio, and percentage of elastic anisotropies for bulk modulus AB and shear modulus AG, and universal anisotropic index AU among m-SixGe3-xN4 (x=0, 1, 2, 3.) The results of electronic band gap reveal that m-Si3N4, m-Si2GeN4, m-SiGe2N4, and m-Ge3N4 are all direct and wide band gap semiconducting materials.

关键词: SixGe3-xN4, mechanical properties, elastic anisotropic, electronic properties

Abstract: The structural, mechanical, elastic anisotropic, and electronic properties of the monoclinic phase of m-Si3N4, m-Si2GeN4, m-SiGe2N4, and m-Ge3N4 are systematically investigated in this work. The calculated results of lattice parameters, elastic constants and elastic moduli of m-Si3N4 and m-Ge3N4 are in good agreement with previous theoretical results. Using the Voigt-Reuss-Hill method, elastic properties such as bulk modulus B and shear modulus G are investigated. The calculated ratio of B/G and Poisson's ratio v show that only m-SiGe2N4 should belong to a ductile material in nature. In addition, m-SiGe2N4 possesses the largest anisotropic shear modulus, Young's modulus, Poisson's ratio, and percentage of elastic anisotropies for bulk modulus AB and shear modulus AG, and universal anisotropic index AU among m-SixGe3-xN4 (x=0, 1, 2, 3.) The results of electronic band gap reveal that m-Si3N4, m-Si2GeN4, m-SiGe2N4, and m-Ge3N4 are all direct and wide band gap semiconducting materials.

Key words: SixGe3-xN4, mechanical properties, elastic anisotropic, electronic properties

中图分类号:  (Structure of bulk crystals)

  • 61.50.-f
61.50.Ah (Theory of crystal structure, crystal symmetry; calculations and modeling) 71.20.Nr (Semiconductor compounds) 71.55.Cn (Elemental semiconductors)