• Open Access

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

A. M. Tsvelik, R. M. Konik, N. V. Prokof'ev, and I. S. Tupitsyn
Phys. Rev. Research 1, 033093 – Published 11 November 2019

Abstract

We develop a formalism to study the resonant inelastic x-ray scattering (RIXS) response in metals based on the diagrammatic expansion for its cross section. The standard approach to the solution of the RIXS problem relies on two key approximations: short-range potentials and noninteracting conduction electrons. However, these approximations are inaccurate for charged particles in metals, where the long-range Coulomb interaction and dynamic screening effects are very important. In this work, 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.

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  • Received 11 June 2019
  • Revised 7 October 2019

DOI:https://doi.org/10.1103/PhysRevResearch.1.033093

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. M. Tsvelik1, R. M. Konik1, N. V. Prokof'ev2, and I. S. Tupitsyn2

  • 1Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
  • 2Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA

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Vol. 1, Iss. 3 — November - December 2019

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