Topological phase transition in 2D quantum Josephson array
摘要
Path Integral Quantum Monte Carlo simulation is used to study thermodynamic properties and a phase diagram of 2D quantum Josephson array, described by 2+1 XY model. The helicity and vorticity moduli, correlation function of phases and other characteristics of the system as functions of quantum parameter and temperature are studied (, is the Josephson coupling constant, is the intragrain capacitance). Quantum fluctuation induced superconductor - normal phase transition is studied in detail through the use of behavior of above-mentioned quantities. No discontinuous or reentrant phase transition in plane is found. Analysis of the vorticity and the renormalized coupling constant leads to the conclusion that the whole line of phase transition is of Kosterlitz - Thouless type.
引用
@article{arxiv.cond-mat/9803300,
title = {Topological phase transition in 2D quantum Josephson array},
author = {A. I. Belousov and Yu. E. Lozovik},
journal= {arXiv preprint arXiv:cond-mat/9803300},
year = {2015}
}
备注
7 pages, 9 Postscript figures. See also Phys. of the Sol. State (Fizika Tverdogo Tela) 39 (1997), 1513