Dynamical collision frequency and conductivity of dense plasmas
DOI:
https://doi.org/10.26577/2409-6121-2015-2-2-53-57Keywords:
Key words, non-ideal plasmas, molecular dynamics method. PACS numbers, 52.27.Gr-, 52.65.Yy-.Abstract
In order to obtain the dynamical collision frequency and the dynamical conductivity, we used the molecular dynamics simulation of dense two-component plasmas with the pair interaction potential of charged particles taking into account quantum-mechanical effects.The temperature range of 10^4 K < T < 10^8 K and the density range of 10^21 cm^-3 < n <= 10^24 cm^-3 were considered. It has been shown that at high temperatures the results for the static collision frequency arein a good agreement with the well-known models of ideal plasmas.It has been found that the dynamical collision frequency of electrons is nearly constant at frequencies lower than the electron plasma frequency and drops fast at frequencies higher than the electron plasma frequency. It is also shown that ina field with a frequency higher than the electron plasma frequency the dense plasma behaves like an insulator in terms of conductivity.References
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[3] W. Lorenzen, B. Holst, R. Redmer. First-order liquid-liquid phase transition in dense hydrogen // Phys. Rev. B. – 2010. – Vol. 82. – P. 195107.
[4] B. Holst, M. French, R. Redmer. Electronic transport coefficients from ab initio simulations and application to dense liquid hydrogen // Phys. Rev. B. – 2011. – Vol. 83. – P. 235120.
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[6] Zh.A. Moldabekov, T.S. Ramazanov, K.N Dzhumagulova. Pair Interaction Potential of Particles for Two-Component Plasma // Contrib. Plasma Phys. – 2012. – Vol. 52. – P. 207 – 210.
[7] C. Deutsch. Nonlinear critical dynamics of a spherical model // Phys. Letters. A. – 1977. – Vol. 60. – P. 4.
[8] V.L. Ginzburg. The propagation of electromagnetic waves in plasma. – M.: Nauka, 1967. – P. 400.
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[10] H. Reinholz, R. Redmer, G. Ropke, A. Wierling. Long-wavelength limit of the dynamical local-field factor and dynamical conductivity of a two-component plasma // Phys. Rev. E. – 2000. – Vol.62. – P.5648-5666.
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Published
2016-10-05
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Plasma Physics and Related Technology
