Warm Dense Matter Demonstrating Non-Drude Conductivity from Observations of Nonlinear Plasmon Damping

B. B. L. Witte, L. B. Fletcher, E. Galtier, E. Gamboa, H. J. Lee, U. Zastrau, R. Redmer, S. H. Glenzer, and P. Sperling
Phys. Rev. Lett. 118, 225001 – Published 31 May 2017

Abstract

We present simulations using finite-temperature density-functional-theory molecular dynamics to calculate the dynamic electrical conductivity in warm dense aluminum. The comparison between exchange-correlation functionals in the Perdew-Burke-Enzerhof and Heyd-Scuseria-Enzerhof (HSE) approximation indicates evident differences in the density of states and the dc conductivity. The HSE calculations show excellent agreement with experimental Linac Coherent Light Source x-ray plasmon scattering spectra revealing plasmon damping below the widely used random phase approximation. These findings demonstrate non-Drude-like behavior of the dynamic conductivity that needs to be taken into account to determine the optical properties of warm dense matter.

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  • Received 18 November 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.225001

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

B. B. L. Witte1,2, L. B. Fletcher1, E. Galtier1, E. Gamboa1, H. J. Lee1, U. Zastrau3, R. Redmer2, S. H. Glenzer1, and P. Sperling1,3

  • 1SLAC National Accelerator Laboratory, 2575 Sand Hill Road, MS 72 Menlo Park, California 94025 USA
  • 2Institut für Physik, Universität Rostock, 18051 Rostock, Germany
  • 3European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany

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Issue

Vol. 118, Iss. 22 — 2 June 2017

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