LOW-TEMPERATURE PROPERTIES OF THE DOUBLE-LAYER QUANTUM HEISENBERG-ANTIFERROMAGNET - MODIFIED SPIN-WAVE METHOD

被引：54

作者：

HIDA, K ^{[1
]}

机构：

[1] HOKKAIDO UNIV,FAC ENGN,DEPT ENGN SCI,SAPPORO,HOKKAIDO 060,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 06期

关键词：

D O I：

10.1143/JPSJ.59.2230

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low temperature properties of the double layer quantum Heisenberg antifer-romgnet are studied by the modified spin wave method proposed by Takahashi. As expected from the lowest order spin wave analysis, the spin fluctuation decreases with the increase of the interlayer coupling JK for small JK, while it turns to increase for large JK for the antiferromagnetic JK. The long range order is destroyed for large enough JK. The disordered phase is the singlet gas phase. The low temperature behaviors of the spin-spin correlation length are also calculated and characters of the low temperature phase are discussed. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：2230 / 2236

页数：7

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