Bands, resonances, edge singularities and excitons in core level spectroscopy investigated within the dynamical mean-field theory

被引：97

作者：

Haverkort, M. W. ^{[1
,2
,3
]}

Sangiovanni, G. ^{[4
]}

Hansmann, P. ^{[5
]}

Toschi, A. ^{[6
]}

Lu, Y. ^{[1
,2
,3
]}

Macke, S. ^{[1
,2
]}

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[3] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[4] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[5] Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France

[6] Vienna Univ Technol, Inst Festkorperphys, A-1040 Vienna, Austria

来源：

EPL | 2014年 / 108卷 / 05期

基金：

奥地利科学基金会;

关键词：

X-RAY-ABSORPTION; ELECTRONIC-STRUCTURE; CE COMPOUNDS; SPECTRA; PHOTOEMISSION; METALS; EMISSION; DIMENSIONS; SYSTEMS; MODEL;

D O I：

10.1209/0295-5075/108/57004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a recently developed impurity solver we exemplify how dynamical mean-field theory captures band excitations, resonances, edge singularities and excitons in core level x-ray absorption spectroscopy (XAS) and core level photo electron spectroscopy (cPES) on metals, correlated metals and Mott insulators. Comparing XAS at different values of the core-valence interaction shows how the quasiparticle peak in the absence of core-valence interactions evolves into a resonance of similar shape, but different origin. Whereas XAS is rather insensitive to the metal insulator transition, cPES can be used, due to nonlocal screening, to measure the amount of local charge fluctuation. Copyright (C) EPLA, 2014

引用

页数：6

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