Berezinskii-Kosterlitz-Thouless transition in two-dimensional lattice gas models

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dc.creatorChamati, H
dc.creatorRomano, S
dc.date2007-01-24
dc.date.accessioned2026-07-07T07:42:45Z
dc.date.available2026-07-07T07:42:45Z
dc.descriptionWe have considered two classical lattice-gas models, consisting of particles that carry multicomponent magnetic momenta, and associated with a two-dimensional square lattices; each site can host one particle at most, thus implicitly allowing for hard-core repulsion; the pair interaction, restricted to nearest neighbors, is ferromagnetic and involves only two components. The case of zero chemical potential has been investigated by Grand--Canonical Monte Carlo simulations; the fluctuating occupation numbers now give rise to additional fluid-like observables in comparison with the usual saturated--lattice situation; these were investigated and their possible influence on the critical behaviour was discussed. Our results show that the present model supports a Berezinskii-Kosterlitz-Thouless phase transition with a transition temperature lower than that of the saturated lattice counterpart due to the presence of ``vacancies''; comparisons were also made with similar models studied in the literature.
dc.description6 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0701584
dc.identifierhttp://arxiv.org/abs/cond-mat/0701584
dc.identifierPhys. Rev. B 73, 184424 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.184424
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122563
dc.subjectStatistical Mechanics
dc.subjectMaterials Science
dc.titleBerezinskii-Kosterlitz-Thouless transition in two-dimensional lattice gas models
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