High-temperature self-energy corrections to x-ray absorption spectra

Abstract

Effects of finite-temperature quasiparticle self-energy corrections to x-ray absorption spectra are investigated within the finite-temperature quasiparticle local density GW approximation up to temperatures $T$ of order the Fermi temperature. To facilitate the calculations, we parametrize the quasiparticle self-energy using low-order polynomial fits. We show that temperature-driven decrease in the electron lifetime substantially broadens the spectra in the near-edge region with increasing $T$. However, the quasiparticle shift is most strongly modified near the onset of plasmon excitations.

References in corpus (3)

• Many-pole model of inelastic losses in x-ray absorption spectra
• Finite temperature Green's function approach for excited state and thermodynamic properties of cool to warm dense matter
• Real-space Green's function approach for x-ray spectra at finite temperature

Cited by in corpus (1)

• Coherently Coupled Carrier and Phonon Dynamics in Elemental Tellurium Probed by XUV Transient Absorption