Stability of LiF Crystal in the Warm Dense Matter State

Stegaĭlov, V. V.

doi:10.1002/ctpp.201010008

Cited by 41 publications

(20 citation statements)

References 19 publications

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“…This model does not take into account (i) the change in the physical properties of the ion subsystem related to heating of the electron subsystem [19,20] and (ii) the appearance of electron pressure [21,22]. In contrast, Chimier et al [12] pointed out that the influence of electron pressure on the ion dynamics may be responsible for a special mechanism of laser ablation.…”

Section: Introductionmentioning

confidence: 91%

Atomistic simulation of laser ablation of gold: Effect of pressure relaxation

Norman

Starikov

Stegaĭlov

2012

J. Exp. Theor. Phys.

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The process of ablation of a gold target by femto and picosecond laser radiation pulses has been studied by numerical simulations using an atomistic model with allowance for the electron subsystem and the dependence of the ion-ion interaction potential on the electron temperature. Using this potential, it is pos sible to take into account the change in the physical properties of the ion subsystem as a result of heating of the electron subsystem. The results of simulations reveal a significant difference between the characteristics of metal ablation by laser pulses of various durations. For ablation with subpicosecond pulses, two mecha nisms of metal fracture related to the evolution of electronic pressure in the system are established.

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Section: Introductionmentioning

confidence: 91%

Atomistic simulation of laser ablation of gold: Effect of pressure relaxation

Norman

Starikov

Stegaĭlov

2012

J. Exp. Theor. Phys.

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“…It is worth noting, this form of approximation yields the correct Wiedemann-Franz law (14). The coefficients A and B were determined as follows.…”

Section: B the Construction Of Approximationmentioning

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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“…9,29 There are the quantum-mechanical simulations devoted to calculations of influence of electronic excitations to material strength. 30,31 These calculations show that in case of metals the excitations rather weakly change melting temperature and phonon spectra.…”

Section: Resultsmentioning

confidence: 91%