The Roton Minimum: Is it a General Feature of Strongly Correlated Liquids?

G. J. Kalman, S. Kyrkos, K. I. Golden, P. Hartmann, Z. Donkó

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The roton minimum is a deep minimum in the collective excitation spectrum of the liquid, forming around fairly high k -values. We have discovered, through MD simulations, that this appears to be a general feature of strongly coupled liquids and is ubiquitous in 2D and 3D Yukawa liquids. We suggest that the physical origin of the roton minimum has to be sought in the quasi-localization of particles in a strongly correlated liquid and in the ensuing formation of local microcrystals whose averaged frequency dispersion would show roton minimum-like feature.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalContributions to Plasma Physics
Volume52
Issue number3
DOIs
Publication statusPublished - Apr 2012

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rotons
liquids
microcrystals
excitation
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Keywords

  • Molecular dynamics simulation
  • Roton minimum
  • Strongly coupled liquids
  • Yukawa liquids

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

The Roton Minimum : Is it a General Feature of Strongly Correlated Liquids? / Kalman, G. J.; Kyrkos, S.; Golden, K. I.; Hartmann, P.; Donkó, Z.

In: Contributions to Plasma Physics, Vol. 52, No. 3, 04.2012, p. 219-223.

Research output: Contribution to journalArticle

Kalman, G. J. ; Kyrkos, S. ; Golden, K. I. ; Hartmann, P. ; Donkó, Z. / The Roton Minimum : Is it a General Feature of Strongly Correlated Liquids?. In: Contributions to Plasma Physics. 2012 ; Vol. 52, No. 3. pp. 219-223.
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