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Molecular dynamics study of a classical two-dimensional electron system: Positional and orientational orders

Authors
  • Muto, Satoru
  • Aoki, Hideo
Type
Published Article
Publication Date
Dec 07, 1999
Submission Date
Jun 15, 1999
Identifiers
DOI: 10.1016/S1386-9477(99)00066-1
arXiv ID: cond-mat/9906213
Source
arXiv
License
Unknown
External links

Abstract

Molecular dynamics simulation is used to investigate the crystallization of a classical two-dimensional electron system, in which electrons interact with the Coulomb repulsion. From the positional and the orientational correlation functions, we have found an indication that the solid phase has a quasi-long-range (power-law correlated) positional order and a long-range orientational order. This implies that the long-range 1/r system shares the absence of the true long-range crystalline order at finite temperatures with short-range ones for which Mermin's theorem applies. We also discuss the existence of the ``hexatic'' phase predicted by the Kosterlitz-Thouless-Halperin-Nelson-Young theory.

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