Topological phase transition in 2D quantum Josephson array

被引：10
|
作者：
Belousov, AI
Lozovik, YE
机构：
[1] Institute of Spectroscopy, Russian Academy of Sciences, 142092, Troitsk, Moscow region
来源：
SOLID STATE COMMUNICATIONS | 1996年 / 100卷 / 06期
关键词：
superconductors; order-disorder effects; phase transitions; thermodynamic properties;
D O I：
10.1016/0038-1098(96)00424-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
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 q and temperature T are studied (q = (h) over bar/root JC), J is the Josephson coupling constant, C 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 q-T 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. Copyright (C) 1996 Elsevier Science Ltd
引用
收藏
页码：421 / 426
页数：6
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