Thermodynamics of two-dimensional XXZ easy-plane quantum Heisenberg magnets

被引：4
|
作者：
Capriotti, L
Cuccoli, A
Tognetti, V
Vaia, R
Verrucchi, P
机构：
[1] IST NAZL FIS MAT,I-50125 FLORENCE,ITALY
[2] CNR,IST ELETTR QUANTIST,I-50127 FLORENCE,ITALY
[3] RUTHERFORD APPLETON LAB,ISIS FACIL,DIDCOT OX11 0QX,OXON,ENGLAND
来源：
JOURNAL OF APPLIED PHYSICS | 1997年 / 81卷 / 08期
关键词：
KOSTERLITZ-THOULESS TRANSITION; 2-DIMENSIONAL XY-MODEL; MONTE-CARLO SIMULATION; PHASE-TRANSITION; ANISOTROPY;
D O I：
10.1063/1.365104
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We consider the quantum easy-plane (XXZ) magnet on the square lattice. In the classical case the system exhibits the Berezinskii-Kosterlitz-Thouless transition. Simulations, both for ferro- and antiferromagnets, using the method of the effective classical Hamiltonian, are made for different spin values and refer to the specific heat, the static spin correlation functions and correlation lengths in a broad range of temperatures, below and above the transition. The effects of quantum fluctuations are quantitatively evaluated and discussed. (C) 1997 American Institute of Physics.
引用
收藏
页码：4137 / 4139
页数：3
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