The two-dimensional S=1 quantum Heisenberg antiferromagnet at finite temperatures

被引：50

作者：

Harada, K ^{[1
]}

Troyer, M

Kawashima, N

机构：

[1] Kyoto Univ, Div Appl Syst Sci, Sakyo Ku, Kyoto 60601, Japan

[2] Univ Tokyo, Inst Solid State Phys, Tokyo 106, Japan

[3] Toho Univ, Dept Phys, Funabashi, Chiba 274, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 04期

关键词：

Heisenberg model; quantum Monte Carlo;

D O I：

10.1143/JPSJ.67.1130

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature dependence of the correlation length susceptibilities and the magnetic structure factor of the two-dimensional spin-1 square lattice quantum Heisenberg antiferromagnet are computed by the quantum Monte Carlo loop algorithm (QMC). In the experimentally relevant temperature regime the theoretically predicted asymptotic low temperature behavior is found to be not valid. The QMC results however, agree reasonably well with the experimental measurements of La2NiO4 even without considering anisotropies in the exchange interactions.

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收藏

页码：1130 / 1133

页数：4

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