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Title: Resonant inelastic x-ray scattering in metals: A diagrammatic approach

Journal Article · · Physical Review Research
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We create a formalism to explore the Resonant Inelastic X-ray Scattering (RIXS) response in metals based on the diagrammatic expansion for its cross section. The standard method to the solution of the RIXS problem relies on two key approximations: short-range potentials and non-interacting conduction electrons. Yet, these approximations are inaccurate for charged particles in metals, where the long-range Coulomb interaction and dynamic screening effects are very important. Here, we study how to extract important information about collective excitations in the Coulomb plasma, plasmons and electron-hole pairs, from RIXS data. We find that single- and multi-plasmon excitations can easily be distinguished by positions of the corresponding peaks, singularities, and their intensities. We also discuss the hybrid processes, where plasmon emission is accompanied by excitation of electron-hole pairs, and study how they manifest themselves.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1573866
Alternate ID(s):
OSTI ID: 1571406
Report Number(s):
BNL-212219-2019-JAAM; PPRHAI; 033093
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Vol. 1 Journal Issue: 3; ISSN 2643-1564
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (17)

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Figures / Tables (5)

FIG. 1(p. 4)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 7)figure FIG. 5

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