KOSTERLITZ-THOULESS TRANSITION IN THE 2-DIMENSIONAL QUANTUM XY MODEL

被引：77

作者：

DING, HQ ^{[1
]}

MAKIVIC, MS ^{[1
]}

机构：

[1] CALTECH,DEPT PHYS,PASADENA,CA 91125

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.42.6827

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Convincing numerical evidence is obtained via extensive quantum Monte Carlo simulations on square lattices as large as 96×96 that the spin-1/2 XY model undergoes a Kosterlitz-Thouless phase transition at kTc/J=0.350(4). Correlation length and in-plane susceptibility diverge at Tc precisely according to the form predicted by Kosterlitz and Thouless for the classical XY model. The specific heat increases very rapidly near Tc and exhibits a peak around kT/J=0.45. © 1990 The American Physical Society.

引用

页码：6827 / 6830

页数：4

共 34 条

[1] RENORMALIZATION GROUP METHOD FOR QUANTUM-MECHANICAL SYSTEMS .1. S= 1-2XY MODEL ON SQUARE LATTICE [J].