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2. Low-temperature thermodynamic study of the diluted planar rotator model using a self-consistent harmonic approximation

Author

J. A. Plascak, A.S.T. Pires, and L.M Castro

Subjects
Physics, Phase transition, Kosterlitz–Thouless transition, Condensed matter physics, Transition temperature, Harmonic, Condensed Matter Physics, Jump process, Helicity, Power law, Electronic, Optical and Magnetic Materials, Vortex
Abstract

The self-consistent harmonic approximation is used to study a dilute planar rotator model in two dimensions. The Kosterlitz–Thouless transition temperature is obtained as a function of p , where p is the concentration of links. The phase transition in the system is deduced from a deviation of the power law describing the decay of the phase correlation function and from a jump in the helicity modulus. Better results are obtained when vortex corrections are included.

Published
2002
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