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Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
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dc conductivity of two-temperature warm dense gold
1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1.
Physical Review. E
|October 15, 2016
Summary
Researchers derived DC conductivity and electron properties in warm dense gold using AC conductivity data. These findings offer benchmarks for electrical resistivity models in dense matter.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Plasma Physics
Background:
- Warm dense matter (WDM) is a state of matter relevant to astrophysics and inertial confinement fusion.
- Understanding the electrical transport properties of WDM is crucial for modeling these phenomena.
- Gold is a relevant material for studying WDM due to its unique electronic properties.
Purpose of the Study:
- To derive DC conductivity, free electron density, and electron momentum relaxation time for gold under warm dense conditions.
- To utilize AC conductivity data and a Drude model interpretation of the dielectric function.
- To provide benchmark data for validating theoretical models of electrical resistivity in WDM.
Main Methods:
- Analysis of AC conductivity data.
- Application of a Drude model to the dielectric function, including intraband, interband, and atomic polarizability contributions.
- Calculation of DC conductivity, free electron density, and electron momentum relaxation time.
Main Results:
- Derived DC conductivity values for warm dense gold up to an energy density of 4.1 MJ/kg.
- Determined free electron density and electron momentum relaxation time.
- Obtained insights into the contributions of different electronic transitions and atomic polarizability.
Conclusions:
- The derived transport properties serve as valuable benchmarks for the extended Ziman formula and average atom models.
- This study advances the understanding of electrical conductivity in warm dense gold.
- The methodology provides a pathway for investigating other materials under similar extreme conditions.
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