J. Phys. IV France 10 (2000) Pr5-117-Pr5-120
Influence of the lattice symmetry on melting of the bilayer Wigner crystalI.V. Schweigert1, V.A. Schweigert1 and F.M. Peeters2
1 Institute of Theoretical and Applied Mechanics, Novosibirsk 630090, Russia
2 Universiteit Antwerpen (UIA), Antwerpen, Belgium
The melting transition of the five different lattices of a bilayer crystal is studied using the Monte-Carlo (MC) technique. We found the surprising result that the square lattice has a substantial larger melting temperature as compared to the other lattice structures, which is a consequence of the specific topology of the temperature induced defects. A new melting criterion is formulated which we show to be universal for bilayers as well as for single layer crystals.
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