Electronic and optical properties of the hydrogen boride sheet from the many-body perturbation theory.

We study the electronic and optical properties of the hydrogen boride sheet by using the many-body perturbation theory with the perturbative(G0W0) approximation. It was found that the hydrogen boride sheet shows a semimetallic electronic structure, supporting the previous theoretical study based on the semilocal density functional theory calculations. It was also found that the optical spectrum calculated based on the quasiparticle energies agrees well with the experiments.

Adsorption of toxic gases on borophene: surface deformation links to chemisorptions.

β borophene has received great attention because of its intriguing mechanical and electronic properties. One of the possible applications of borophene is gas sensing. However, the interaction between common gases and β borophene remains to be clarified.