吉林大学学报(理学版) ›› 2019, Vol. 57 ›› Issue (3): 658-663.

• 物理 • 上一篇    下一篇

Si8-xGex合金的电子、 力学和光学性质第一性原理计算#br#

杨晓翠, 李伟, 马宏源, 于卓, 肖俊平   

  1. 白城师范学院 物理与电子信息学院,  吉林 白城 137000
  • 收稿日期:2018-04-08 出版日期:2019-05-26 发布日期:2019-05-20
  • 通讯作者: 杨晓翠 E-mail:yxc0622@163.com

FirstPrinciples Calculation of Electronic, Mechanical and Optical Properties of Si8-xGex Alloys#br#

YANG Xiaocui, LI Wei, MA Hongyuan, YU Zhuo, XIAO Junping   

  1. College of Physics and Electronic Information, Baicheng Normal University, Baicheng 137000, Jilin Province, China
  • Received:2018-04-08 Online:2019-05-26 Published:2019-05-20
  • Contact: YANG Xiaocui E-mail:yxc0622@163.com

摘要: 采用基于密度泛函理论的第一性原理计算方法, 研究 Si8-xGex合金的电子、 力学和光学性质. 计算结果表明: Si8-xGex合金的能带结构相似; 弹性系数、 体模量和剪切模量均随\%x的增大呈减小趋势; 静态介电常数、 折射率和反射系数均随x的增大呈准线性增加趋势; 等离子体振荡频率随x的增大呈减小趋势.

关键词: Si8-xGex合金, 电子性质, 光学性质, 第一性原理计算

Abstract: The electronic, mechanical and optical properties of  Si8-xGex alloys were investigated by using firstprinciples calculation method based on density functional theory. The calculation results show that the structures of energy bands of  Si8-xGex alloy are similar, the elastic coefficient, bulk modulus and shear modulus decrease with the increase of x, the 
static dielectric constants, refractive index and reflection coefficient increase quasilinearly with the increase of x, 
and the plasma oscillation frequency decreases with the increase of x.

Key words: Si8-xGex alloy, electronic property, optical property, firstprinciples calculation

中图分类号: 

  • O482.1