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

被引:76
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.
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页码:6827 / 6830
页数:4
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