Mechanical anisotropy and electronic properties of X2N2 (XH2 ): first-principles calculations*

Xiao-Zhen Li(李小珍),Meng-Jiang Xing(邢孟江)

Table 4. The calculated the maximum values, the minimum values, and ratio of Young’s modulus, shear modulus and Poisson’s ratio of X2 N2 (XH2 ) (X = C, Si, Ge).

E G v E max E min Ratio G max G min Ratio v max v min Ratio C2 N2 (CH2 ) 665 372 1.79 275 150 1.83 0.29 0.07 4.14 Si2 N2 (SiH2 ) 229 127 1.80 104 43 2.42 0.48 0.07 6.86 Ge2 N2 (GeH2 ) 170 101 1.68 74 36 2.05 0.42 0.07 6.00