Role of topological defects in the phase transition of modified XY model : A Monte Carlo study

Abstract

Monte Carlo simulation has been performed on a classical two dimensional XY- model with a modified form of interaction potential to investigate the role of topological defects on the phase transition exhibited by the model. In simulations in a restricted ensemble without defects, the system appears to remain ordered at all temperatures. Suppression of topological defects on the square plaquettes in the modified XY- model leads to complete elimination of the phase transition observed in this model.

19 pages, 12 figures, Accepted for publication in Phys. Rev. E

References in corpus (3)

• Phase Transitions In Two Planar Lattice Models And Topological Defects: A Monte Carlo Study
• Performance of Wang-Landau algorithm in continuous spin models and a case study : modified XY-model
• Finite size scaling and first order phase transition in a modified XY-model

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