Local interpretation of time-resolved x-ray absorption in Mott insulators: Insights from nonequilibrium dynamical mean-field theory

Werner P, Golez D, Eckstein M (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Physical Review B American Physical Society

Book Volume: 106

Journal Issue: 16

DOI: 10.1103/PhysRevB.106.165106

Abstract

We present a formalism based on nonequilibrium dynamical mean-field theory (DMFT) which allows to compute the time-resolved x-ray absorption spectrum (XAS) of photoexcited solids. By applying this formalism to the photodoped half-filled and quarter-filled two-orbital Hubbard models in the Mott insulating regime we clarify how the time-resolved XAS signal reflects the nonequilibrium population of different local states. Apart from the missing broadening associated with continuum excitations, the atomic XAS spectrum computed with the nonthermal state populations provides a good approximation to the full nonequilibrium DMFT result. This suggests a route to combine the accurate DMFT description of nonequilibrium states of solids with cluster calculations of the XAS signal.

Authors with CRIS profile

Martin Eckstein Lehrstuhl für Theoretische Festkörperphysik

Involved external institutions

University of Fribourg / Universitè de Fribourg CH Switzerland (CH) Jožef Stefan Institute SI Slovenia (SI)

How to cite

APA:

Werner, P., Golez, D., & Eckstein, M. (2022). Local interpretation of time-resolved x-ray absorption in Mott insulators: Insights from nonequilibrium dynamical mean-field theory. Physical Review B, 106(16). https://dx.doi.org/10.1103/PhysRevB.106.165106

MLA:

Werner, Philipp, Denis Golez, and Martin Eckstein. "Local interpretation of time-resolved x-ray absorption in Mott insulators: Insights from nonequilibrium dynamical mean-field theory." Physical Review B 106.16 (2022).

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