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

Starrett, C. E.

doi:10.1016/j.hedp.2016.04.001

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

Journal Article · Wed Apr 13 00:00:00 EDT 2016 · High Energy Density Physics

DOI:https://doi.org/10.1016/j.hedp.2016.04.001· OSTI ID:1256293

Starrett, C. E. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1256293

Alternate ID(s):: OSTI ID: 1357284

Report Number(s):: LA-UR--16-21926

Journal Information:: High Energy Density Physics, Journal Name: High Energy Density Physics Journal Issue: C Vol. 19; ISSN 1574-1818

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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