The electronic, optical, and thermodynamical properties of tetragonal, monoclinic, and orthorhombic M3N4 (M = Si, Ge, Sn): A first-principles study

The electronic, optical, and thermodynamical properties of tetragonal, monoclinic, and orthorhombic M₃N₄ (M = Si, Ge, Sn): A first-principles study

Chen Dong^{1, †}, Cheng Ke², Qi Bei-Ying¹

(color online) Temperature dependences of the fundamental properties of t-, m-, and o-M₃N₄ (M=Si, Ge, Sn): (a) normalized internal energy ; (b) Grüneisen parameter γ.