NDLI: Evolution of AC conductivity in non-equilibrium warm dense gold

Content Provider	IEEE Xplore Digital Library
Author	Tsui, Y.Y. Chen, Z. Holst, B. Kirkwood, S.E. Sametoglu, V. Reid, M. Recoules, V. Ng, A.
Copyright Year	2013
Description	Author affiliation: Univ. of Ottawa, Ottawa, ON, Canada (Kirkwood, S.E.) \|\| Univ. of British Columbia, Vancouver, BC, Canada (Ng, A.) \|\| DAM, CEA, Arpajon, France (Holst, B.; Recoules, V.) \|\| Univ. of Northern British Columbia, BC, Canada (Reid, M.) \|\| Univ. of Alberta, Edmonton, AB, Canada (Tsui, Y.Y.; Chen, Z.; Sametoglu, V.)
Abstract	AC conductivity has long been of interest in the study of electronic structure and transport properties of Warm Dense Matter. Using a chirped pulse probe technique, we have obtained single-shot measurements of the temporal evolution of AC conductivity during electron energy relaxation in non-equilibrium warm dense gold produced by femtosecond-laser heating with energy density up to 4.1MJ/kg $(8×10^{10}J/m^{3}).$ The results uncover important changes that have been masked in earlier studies. Equally significant, they provide the first benchmark for testing an ab-initio model that is used to calculate electron heat capacity, electron-ion coupling and AC conductivity in a single, first principles framework. While measurements of the real part of AC conductivity corroborate our theoretical temperature-dependent electron heat capacity, they point to an electron-ion coupling factor of $~2.2×10^{16}W/m^{3}$ K, substantially below that predicted by theory. In addition, measurements of the imaginary part of AC conductivity reveal the need to improve theoretical treatment of intraband contribution at very low photon energy.
Starting Page	1
Ending Page	1
File Size	100805
Page Count	1
File Format	PDF
ISBN	9781467351713
ISSN	07309244
DOI	10.1109/PLASMA.2013.6635091
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductivity Conductivity measurement Heating Gold Energy measurement Couplings Temperature measurement
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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