Radial-Fluctuation-Induced Stabilization of the Ordered State in Two-Dimensional Classical Clusters

I. V. Schweigert; V. A. Schweigert; F. M. Peeters

doi:10.1103/PhysRevLett.84.4381

Radial-Fluctuation-Induced Stabilization of the Ordered State in Two-Dimensional Classical Clusters

I. V. Schweigert, V. A. Schweigert, and F. M. Peeters

Phys. Rev. Lett. 84, 4381 – Published 8 May 2000

Abstract

Melting of two-dimensional (2D) clusters of classical particles is studied using Brownian dynamics and Langevin molecular dynamics simulations. The particles are confined either by a circular hard wall or by a parabolic external potential and interact through a dipole or a screened Coulomb potential. We found that, with decreasing strength of the interparticle interaction, clusters with a short-range interparticle interaction and confined by a hard wall exhibit a reentrant behavior in its orientational order.

Received 3 December 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.4381

Authors & Affiliations

I. V. Schweigert^*, V. A. Schweigert^†, and F. M. Peeters^‡

Departement Natuurkunde, Universiteit Antwerpen (UIA), B-2610 Antwerpen, Belgium

^*Permanent address: Institute of Theoretical and Applied Mechanics, Russian Academy of Sciences, Novosibirsk 630090, Russia.
^†
^‡Electronic mail: peeters@uia.ua.ac.be