Single-State Measurement of Electrical Conductivity of Warm Dense Gold

Widmann, K.; Ao, T.; Foord, M. E.; Price, D.; Ellis, Andrew; Springer, P. T.; Ng, A.

doi:10.1103/physrevlett.92.125002

Cited by 115 publications

(69 citation statements)

References 14 publications

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“…4. In fact, comparisons with measured conductivities of transition metals at standard conditions suggest that Z continuum is the least reliable choice for the number of charge carriers; experiments in the warm dense matter regime also support this conclusion [23]. Finally, we note that the predicted density of the metal-non-metal transition is also quite sensitive to the choice of exchange and correlation potential because of the strong influence of this potential on the electronic structure.…”

Section: Transport Quantitiesmentioning

confidence: 60%

Equation of state, occupation probabilities and conductivities in the average atom Purgatorio code

Sterne

Hansen

Wilson

et al. 2007

High Energy Density Physics

127

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We report on recent developments with the Purgatorio code, a new implementation of Liberman's Inferno model. This fully relativistic average atom code uses phase shift tracking and an efficient refinement scheme to provide an accurate description of continuum states. The resulting equations of state accurately represent the atomic shell-related features which are absent in Thomas-Fermi-based approaches. We discuss various representations of the exchange potential and some of the ambiguities in the choice of the effective charge Z * in average atom models, both of which affect predictions of electrical conductivities and radiative properties.

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Section: Transport Quantitiesmentioning

confidence: 60%

Equation of state, occupation probabilities and conductivities in the average atom Purgatorio code

Sterne

Hansen

Wilson

et al. 2007

High Energy Density Physics

127

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“…The experiments on the interaction of femtosecond lasers with matter are widespread nowadays [1][2][3][4] . During the ultrafast heating the matter passes through the twotemperature state with hot electrons and relatively cold ions.…”

Section: Introductionmentioning

confidence: 99%

Transport and optical properties of warm dense aluminum in the two-temperature regime: Ab initio calculation and semiempirical approximation

Knyazev

Levashov

2014

Physics of Plasmas

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This work is devoted to the investigation of transport and optical properties of liquid aluminum in the two-temperature case. At first optical properties, static electrical and thermal conductivities were obtained in the ab initio calculation. The ab initio calculation is based on the quantum molecular dynamics, density functional theory and the Kubo-Greenwood formula. The semiempirical approximation was constructed based on the results of the ab initio caculation. The approximation yields the dependences σ 1DC ∝ 1/T 0.25 i and K ∝ T e /T 0.25 i for the static electrical conductivity and thermal conductivity, respectively. The approximation is valid for liquid aluminum at ρ = 2.70 g/cm 3 , 3 kK ≤ T i ≤ T e ≤ 20 kK. Our results are well described by the Drude model with the effective relaxation time τ ∝ T −0.25 i . We have compared our results with a number of other models. They are all reduced in the low-temperature limit to the Drude model with different expressions for the relaxation time τ . Our results are not consistent with the models in which τ ∝ T −1 i and support the models which use the expressions with the slower decrease of the relaxation time.

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“…The area of warm, dense matter (WDM) and high energy density physics (HEDP) [1] has received considerable attention recently due its identification with an assortment of environments as diverse as the interiors of exoplanets [2], the atmospheres of stars [3], inertial confinement fusion capsules [4], and the plasma from laser interactions [5] with materials from clusters to nanostructures that span temperatures from a few thousand (∼1 eV) to a few million (∼100 eV) degrees Kelvin and densities from a few hundredths solid (∼ 10 21 atoms/cm 3 ) to hundreds of times compressed solid (∼ 10 25 atoms/cm 3 ). The WDM regime presents a particularly difficult challenge given that quantum mechanical effects play a crucial role in the accurate representation of this complex medium under extreme conditions.…”

Section: Introductionmentioning

confidence: 99%

Transport properties of lithium hydride at extreme conditions from orbital-free molecular dynamics

et al. 2013

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We have performed a systematic study of lithium hydride (LiH), using orbital-free molecular dynamics, with a focus on mass transport properties such as diffusion and viscosity by extending our previous studies at the lower end of the warm, dense matter regime to cover a span of densities from ambient to ten-fold compressed and temperatures from 10 eV to 10 keV. We determine analytic formulas for self-and mutual-diffusion coefficients, and viscosity, which are in excellent agreement with our molecular dynamics results, and interpolate smoothly between liquid and dense plasma regimes. In addition, we find the orbital-free calculations begin to agree with the Brinzinskii-Landau formula above about 250 eV at which point the medium becomes fully ionized. A binary-ion model based on a bare Coulomb interaction within a neutralizing background with the effective charges determined from a regularization prescription shows good agreement above about 100 eV with the orbital-free results. Finally, we demonstrate the validity of a pressure-based mixing rule in determining the transport properties from the pure-species quantities.

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Single-State Measurement of Electrical Conductivity of Warm Dense Gold

Cited by 115 publications

References 14 publications

Equation of state, occupation probabilities and conductivities in the average atom Purgatorio code

Equation of state, occupation probabilities and conductivities in the average atom Purgatorio code

Transport and optical properties of warm dense aluminum in the two-temperature regime: Ab initio calculation and semiempirical approximation

Transport properties of lithium hydride at extreme conditions from orbital-free molecular dynamics

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