THERMODYNAMIC PROPERTIES OF ANTIFERROMAGNETIC QUANTUM XY-MODEL ON THE TRIANGULAR LATTICE

被引：3

作者：

HOMMA, S

MATSUDA, H

OGITA, N

SANO, K

机构：

[1] KYUSHU UNIV, DEPT BIOL, FUKUOKA 812, JAPAN

[2] FUJITSU LTD, SYST LAB, TOKYO 144, JAPAN

[3] MIE UNIV, FAC PEDAG, TSU, MIE 514, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 03期

关键词：

QUANTUM MONTE-CARLO; TRIANGULAR LATTICE; ANTIFERROMAGNET; FRUSTRATION; DECOUPLED CELL METHOD;

D O I：

10.1143/JPSJ.62.880

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thermodynamic properties of antiferromagnetic quantum XY-model (s=1/2) on a triangular lattice are studied by the Decoupled Cell Monte Carlo Method (DCM). The decoupled cell (DC) used in this study consists of 7 spins. The size N of systems are 15*15, 30*30, 45*45, respectively. Detailed studies of spin pair correlation functions for both x- and z-components are perfomed at various temperatures. The results suggest that the existence of the shortrange three sublattice structure. The mean square magnetization of a sublattice for the x-component does not depend on N, whereas that of the z-component shows a strong dependence on N below a certain temperature.

引用

页码：880 / 887

页数：8

共 44 条

[1] RESONATING VALENCE BONDS - NEW KIND OF INSULATOR [J].