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

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

2009-11-05

arxiv.org/abs/0911.1005v3

Phys. Rev. E 81, 041120 (2010)

Physics

Condensed Matter

Statistical Mechanics

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

Scientific paper

10.1103/PhysRevE.81.041120

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.

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