Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory

TL;DR

This paper reviews how electronic correlations in transition metal pnictides and chalcogenides affect their spectral properties, using ARPES experiments and DFT+DMFT calculations to analyze doping-dependent quasi-particle behavior.

Contribution

It provides a comparative analysis of experimental ARPES data and theoretical DFT+DMFT results, highlighting doping effects on quasi-particle renormalization and coherence.

Findings

Doping influences quasi-particle mass renormalization.

Electronic correlations cause incoherent metallic behavior.

Spectroscopic signatures reflect local Coulomb interactions.

Abstract

Electronic Coulomb correlations lead to characteristic signatures in the spectroscopy of transition metal pnictides and chalcogenides: quasi-particle renormalizations, lifetime effects or incoherent badly metallic behavior above relatively low coherence temperatures are measures of many-body effects due to local Hubbard and Hund's couplings. We review and compare the results of angle-resolved photoemission spectroscopy experiments (ARPES) and of combined density functional dynamical mean field theory (DFT+DMFT) calculations. We emphasize the doping-dependence of the quasi-particle mass renormalization and coherence properties.