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) Reflectivity curves of different M₃N₄ (M=Si, Ge, Sn) polymorphs: (a) tetragonal; (b) monoclinic; (c) orthorhombic. Loss function of different polymorphs: (d) tetragonal; (e) monoclinic; (f) orthorhombic. The black/dashed, blue/solid, and red/solid curves represent the Si₃N₄, Ge₃N₄, and Sn₃N₄ compounds, respectively.