Journal
CONTRIBUTIONS TO PLASMA PHYSICS
Volume 55, Issue 2-3, Pages 164-171Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ctpp.201400103
Keywords
Warm dense matter; density functional theory; free electrons; two-temperature model
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Funding
- Russian Science Foundation [14-19-01487]
- Russian Science Foundation [14-19-01487] Funding Source: Russian Science Foundation
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Non-equilibrium two-temperature warm dense metals consist of the ion subsystem that is subjected to structural transitions and involved in the mass transfer, and the electron subsystem that in various pulsed experiments absorbs energy and then evolves together with ions to equilibrium. Definition of pressure in such non-equilibrium systems causes certain controversy. In this work we make an attempt to clarify this definition that is vital for proper description of the whole relaxation process. Using the density functional theory we analyze on examples of Al and Au electronic pressure components in warm dense metals. Appealing to the Fermi gas model we elucidate a way to find a number of free delocalized electrons in warm dense metals. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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