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Title: Observations of non-linear plasmon damping in dense plasmas

Abstract

Here, we present simulations using finite-temperature density-functional-theory molecular-dynamics to calculate dynamic dielectric properties in warm dense aluminum. The comparison between exchange-correlation functionals in the Perdew, Burke, Ernzerhof approximation, Strongly Constrained and Appropriately Normed Semilocal Density Functional, and Heyd, Scuseria, Ernzerhof (HSE) approximation indicates evident differences in the electron transition energies, dc conductivity, and Lorenz number. The HSE calculations show excellent agreement with x-ray scattering data as well as dc conductivity and absorption measurements. These findings demonstrate non-Drude behavior of the dynamic conductivity above the Cooper minimum that needs to be taken into account to determine optical properties in the warm dense matter regime.

Authors:
 [1];  [2];  [3];  [4];  [5]; ORCiD logo [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. Rostock, Rostock (Germany)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); European XFEL, Schenefeld (Germany); Aible GmbH, Rostock (Germany)
  3. Univ. Rostock, Rostock (Germany)
  4. CEA, DAM, DIF, Arpajon Cedex (France)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1458535
Alternate Identifier(s):
OSTI ID: 1426526
Grant/Contract Number:  
AC02-76SF00515; FOR 2440; SFB 652; FWP 100182
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Witte, B. B. L., Sperling, P., French, M., Recoules, V., Glenzer, S. H., and Redmer, R. Observations of non-linear plasmon damping in dense plasmas. United States: N. p., 2018. Web. doi:10.1063/1.5017889.
Witte, B. B. L., Sperling, P., French, M., Recoules, V., Glenzer, S. H., & Redmer, R. Observations of non-linear plasmon damping in dense plasmas. United States. doi:10.1063/1.5017889.
Witte, B. B. L., Sperling, P., French, M., Recoules, V., Glenzer, S. H., and Redmer, R. Fri . "Observations of non-linear plasmon damping in dense plasmas". United States. doi:10.1063/1.5017889. https://www.osti.gov/servlets/purl/1458535.
@article{osti_1458535,
title = {Observations of non-linear plasmon damping in dense plasmas},
author = {Witte, B. B. L. and Sperling, P. and French, M. and Recoules, V. and Glenzer, S. H. and Redmer, R.},
abstractNote = {Here, we present simulations using finite-temperature density-functional-theory molecular-dynamics to calculate dynamic dielectric properties in warm dense aluminum. The comparison between exchange-correlation functionals in the Perdew, Burke, Ernzerhof approximation, Strongly Constrained and Appropriately Normed Semilocal Density Functional, and Heyd, Scuseria, Ernzerhof (HSE) approximation indicates evident differences in the electron transition energies, dc conductivity, and Lorenz number. The HSE calculations show excellent agreement with x-ray scattering data as well as dc conductivity and absorption measurements. These findings demonstrate non-Drude behavior of the dynamic conductivity above the Cooper minimum that needs to be taken into account to determine optical properties in the warm dense matter regime.},
doi = {10.1063/1.5017889},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 25,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
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Cited by: 5 works
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Figures / Tables:

FIG. 1. FIG. 1. : Calculated dynamic electrical conductivity showing the influence of the XC functional in DFT-MD simulations. Calculations are performed for solid density aluminum at a temperature of $T$ = 0.5 eV. For small energies, the conductivity agrees with the Drude model62 (dotted lines). For hω > 21 eV, themore » non-Drude-like behavior of aluminum becomes significant.10 For energies hω > Δ$E$2p-free, bound free transitions from the 2p electrons are observed. For energies hω > Δ$E$2s-free, transitions from the 2s state to the continuum (dashed line in the inset) contribute to the total dynamic conductivity (solid line); ionization energies from PBE are indicated with black dashed lines. We compare to the dynamic conductivity from an average atom (AA) model63 (green line).« less

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