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Title: Kubo–Greenwood approach to conductivity in dense plasmas with average atom models

Abstract

In this study, a new formulation of the Kubo–Greenwood conductivity for average atom models is given. The new formulation improves upon previous treatments by explicitly including the ionic-structure factor. Calculations based on this new expression lead to much improved agreement with ab initio results for DC conductivity of warm dense hydrogen and beryllium, and for thermal conductivity of hydrogen. We also give and test a slightly modified Ziman–Evans formula for the resistivity that includes a non-free electron density of states, thus removing an ambiguity in the original Ziman–Evans formula. Again, results based on this expression are in good agreement with ab initio simulations for warm dense beryllium and hydrogen. However, for both these expressions, calculations of the electrical conductivity of warm dense aluminum lead to poor agreement at low temperatures compared to ab initio simulations.

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1256293
Alternate Identifier(s):
OSTI ID: 1357284
Report Number(s):
LA-UR-16-21926
Journal ID: ISSN 1574-1818
Grant/Contract Number:  
AC52-06NA25396; 20150656ECR
Resource Type:
Accepted Manuscript
Journal Name:
High Energy Density Physics
Additional Journal Information:
Journal Volume: 19; Journal Issue: C; Journal ID: ISSN 1574-1818
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Starrett, C. E. Kubo–Greenwood approach to conductivity in dense plasmas with average atom models. United States: N. p., 2016. Web. doi:10.1016/j.hedp.2016.04.001.
Starrett, C. E. Kubo–Greenwood approach to conductivity in dense plasmas with average atom models. United States. doi:10.1016/j.hedp.2016.04.001.
Starrett, C. E. Wed . "Kubo–Greenwood approach to conductivity in dense plasmas with average atom models". United States. doi:10.1016/j.hedp.2016.04.001. https://www.osti.gov/servlets/purl/1256293.
@article{osti_1256293,
title = {Kubo–Greenwood approach to conductivity in dense plasmas with average atom models},
author = {Starrett, C. E.},
abstractNote = {In this study, a new formulation of the Kubo–Greenwood conductivity for average atom models is given. The new formulation improves upon previous treatments by explicitly including the ionic-structure factor. Calculations based on this new expression lead to much improved agreement with ab initio results for DC conductivity of warm dense hydrogen and beryllium, and for thermal conductivity of hydrogen. We also give and test a slightly modified Ziman–Evans formula for the resistivity that includes a non-free electron density of states, thus removing an ambiguity in the original Ziman–Evans formula. Again, results based on this expression are in good agreement with ab initio simulations for warm dense beryllium and hydrogen. However, for both these expressions, calculations of the electrical conductivity of warm dense aluminum lead to poor agreement at low temperatures compared to ab initio simulations.},
doi = {10.1016/j.hedp.2016.04.001},
journal = {High Energy Density Physics},
number = C,
volume = 19,
place = {United States},
year = {2016},
month = {4}
}

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