First-principles study of the bandgap renormalization and optical property of $\beta$-LiGaO${}_2$

Dangqi Fang

$\beta$-LiGaO${}_2$ with an orthorhombic wurtzite-derived structure is a candidate ultrawide direct-bandgap semiconductor. In this work, using the non-adiabatic Allen-Heine-Cardona appro…