Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-03-05
Physical Review E 70, 066125 (2004)
Physics
Condensed Matter
Statistical Mechanics
Related work has been presented in 22 nd International Conference on Statistical Physics, STATPHYS22, IISC Bangalore, India
Scientific paper
10.1103/PhysRevE.70.066125
Monte Carlo simulation has been performed in the planar P(_{2}) and P(_{4}) models to investigate the effects of the suppression of topological defects on the phase transition exhibited by these models. Suppression of the 1/2-defects on the square plaquettes in the P(_{2}) model leads to complete elimination of the phase transition observed in this model. However in the P(_{4}) model, on suppressing the single 1/2-defects on square plaquettes, the otherwise first order phase transition changes to a second order one which occurs at a higher temperature and this is due to presence of large number of 1/2-pair defects which are left within the square plaquettes. When we suppressed these charges too, complete elimination of phase transition was observed.
Dutta Subhrajit
Roy Soumen Kumar
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