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Title: Signatures of multiple charge excitations in resonant inelastic x-ray scattering spectra of metals

Abstract

In this work, we study how multiple charge excitations appear in the resonant inelastic x-ray scattering (RIXS) spectra of metals. Typically, the focus is upon single excitations in the problem, the plasmons and electron-hole pairs, while the multiexcitation processes are neglected. However, at small momentum transfer the multiexcitation contributions may dominate the signal and one needs to understand how to interpret the data in such cases. In particular, we demonstrate how to “decode” the total multiexcitation intensity and extract the plasmon dispersion. Furthermore, while our calculations are based on the random phase approximation for jellium, which does not allow us to obtain quantitatively precise results in the entire region of parameters, we expect them to capture semiqualitatively all features expected for charged Fermi-liquid states, including universal and singular properties of the RIXS spectra.

Authors:
 [1]; ORCiD logo [2];  [2];  [1]
  1. Univ. of Massachusetts, Amherst, MA (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES), Materials Sciences & Engineering Division
OSTI Identifier:
1656449
Report Number(s):
BNL-216315-2020-JAAM
Journal ID: ISSN 2469-9950; TRN: US2202744
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 102; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Metals; diagrammatic methods; random phase approximation; resonant elastic x-ray scattering; x-ray scattering; x-ray techniques

Citation Formats

Tupitsyn, I. S., Tsvelik, A. M., Konik, R. M., and Prokof'ev, N. V. Signatures of multiple charge excitations in resonant inelastic x-ray scattering spectra of metals. United States: N. p., 2020. Web. doi:10.1103/physrevb.102.075140.
Tupitsyn, I. S., Tsvelik, A. M., Konik, R. M., & Prokof'ev, N. V. Signatures of multiple charge excitations in resonant inelastic x-ray scattering spectra of metals. United States. https://doi.org/10.1103/physrevb.102.075140
Tupitsyn, I. S., Tsvelik, A. M., Konik, R. M., and Prokof'ev, N. V. Thu . "Signatures of multiple charge excitations in resonant inelastic x-ray scattering spectra of metals". United States. https://doi.org/10.1103/physrevb.102.075140. https://www.osti.gov/servlets/purl/1656449.
@article{osti_1656449,
title = {Signatures of multiple charge excitations in resonant inelastic x-ray scattering spectra of metals},
author = {Tupitsyn, I. S. and Tsvelik, A. M. and Konik, R. M. and Prokof'ev, N. V.},
abstractNote = {In this work, we study how multiple charge excitations appear in the resonant inelastic x-ray scattering (RIXS) spectra of metals. Typically, the focus is upon single excitations in the problem, the plasmons and electron-hole pairs, while the multiexcitation processes are neglected. However, at small momentum transfer the multiexcitation contributions may dominate the signal and one needs to understand how to interpret the data in such cases. In particular, we demonstrate how to “decode” the total multiexcitation intensity and extract the plasmon dispersion. Furthermore, while our calculations are based on the random phase approximation for jellium, which does not allow us to obtain quantitatively precise results in the entire region of parameters, we expect them to capture semiqualitatively all features expected for charged Fermi-liquid states, including universal and singular properties of the RIXS spectra.},
doi = {10.1103/physrevb.102.075140},
journal = {Physical Review B},
number = 7,
volume = 102,
place = {United States},
year = {Thu Aug 27 00:00:00 EDT 2020},
month = {Thu Aug 27 00:00:00 EDT 2020}
}

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