The electronic, optical, and thermodynamic properties of borophene from first-principles calculations

Borophene (a two-dimensional boron sheet) is a new type of two-dimensional material, which was recently grown successfully on single crystal Ag substrates. In this paper, we investigate the electronic structure and bonding characteristics of borophene by first-principles calculations. The band structure of borophene shows highly anisotropic metallic behaviour. The obtained optical properties of borophene exhibit strong anisotropy as well. Finally, the thermodynamic properties are investigated based on the phonon properties.