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 (15)

• X-ray Absorption Near-Edge Structure calculations with pseudopotentials. Application to K-edge in diamond and alpha-quartz
• Local Spin-density Approximation Exchange-correlation Free-energy Functional
• Ab initio Exchange-Correlation Free Energy of the Uniform Electron Gas at Warm Dense Matter Conditions
• X-ray Absorption Fine Structure in Embedded Atoms
• The importance of finite-temperature exchange-correlation for warm dense matter calculations
• Nonempirical Semi-local Free-Energy Density Functional for Matter Under Extreme Conditions
• Projector augmented wave calculation of x-ray absorption spectra at the L2,3 edges
• Many-pole model of inelastic losses in x-ray absorption spectra
• Hot Phonon and Carrier Relaxation in Si(100) Determined by Transient Extreme Ultraviolet Spectroscopy
• Finite temperature Green's function approach for excited state and thermodynamic properties of cool to warm dense matter
• Improved Equation of State for Finite-Temperature Spin-Polarized Electron Liquids on the Basis of Singwi-Tosi-Land-Sjolander Approximation
• Ab-initio simulations and measurements of the free-free opacity in Aluminum
• Establishing non-thermal regimes in pump-probe electron-relaxation dynamics
• Understanding XANES spectra of two-temperature warm dense copper using ab initio simulation
• 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