Resonant x-ray emission of hexagonal boron nitride

The electronic structure of hexagonal boron nitride (h-BN) is explored using measurements of x-ray absorption and resonant inelastic x-ray scattering (RIXS) at the nitrogen K edge ($1\mathit{s}$) in tandem with calculations using many-body perturbation theory within the $\mathit{GW}$ and Bethe-Salpeter equation (BSE) approximations. Our calculations include the effects of lattice disorder from phonons activated thermally and from zero-point energy. They highlight the influence of disorder on near-edge x-ray spectra.