Collective modes in 2-D Yukawa solids and liquids

Péter Hartmann, Z. Donkó, Gabor J. Kalman, Stamatios Kyrkos, Marlene Rosenberg, Pradip M. Bakshi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report comparative studies on collective excitations in 2-D complex plasmas, in which particles interact through the Yukawa potential, encompassing both the solid and the strongly coupled liquid states. Dispersion and polarization of the collective modes in the solid state are calculated through the lattice summations, while in the liquid state, through molecular dynamics (MD) simulations in conjunction with the theoretical quasi-localized charge approximation analysis. The latter closely emulates the dispersion, resulting from an angular averaging in the lattice. In general, however, the lattice dispersion is substantially different from that of the liquid. The MD simulations show the dramatic transformation of the anisotropic phonon dispersion of the crystal lattice near the solid-liquid transition into the isotropic liquid dispersion.

Original languageEnglish
Pages (from-to)337-341
Number of pages5
JournalIEEE Transactions on Plasma Science
Volume35
Issue number2 II
DOIs
Publication statusPublished - Apr 2007

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liquids
molecular dynamics
Yukawa potential
crystal lattices
simulation
solid state
polarization
approximation
excitation

Keywords

  • 2-D Yukawa system
  • Molecular dynamics (MD) simulation
  • Phonon dispersion
  • Strongly coupled plasma

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Hartmann, P., Donkó, Z., Kalman, G. J., Kyrkos, S., Rosenberg, M., & Bakshi, P. M. (2007). Collective modes in 2-D Yukawa solids and liquids. IEEE Transactions on Plasma Science, 35(2 II), 337-341. https://doi.org/10.1109/TPS.2007.893259

Collective modes in 2-D Yukawa solids and liquids. / Hartmann, Péter; Donkó, Z.; Kalman, Gabor J.; Kyrkos, Stamatios; Rosenberg, Marlene; Bakshi, Pradip M.

In: IEEE Transactions on Plasma Science, Vol. 35, No. 2 II, 04.2007, p. 337-341.

Research output: Contribution to journalArticle

Hartmann, P, Donkó, Z, Kalman, GJ, Kyrkos, S, Rosenberg, M & Bakshi, PM 2007, 'Collective modes in 2-D Yukawa solids and liquids', IEEE Transactions on Plasma Science, vol. 35, no. 2 II, pp. 337-341. https://doi.org/10.1109/TPS.2007.893259
Hartmann, Péter ; Donkó, Z. ; Kalman, Gabor J. ; Kyrkos, Stamatios ; Rosenberg, Marlene ; Bakshi, Pradip M. / Collective modes in 2-D Yukawa solids and liquids. In: IEEE Transactions on Plasma Science. 2007 ; Vol. 35, No. 2 II. pp. 337-341.
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