EFFECT OF SMALL INTERCHAIN COUPLING ON ONE-DIMENSIONAL ANTIFERROMAGNETIC QUANTUM HEISENBERG SPIN SYSTEMS - THE INTEGER-SPIN CASE

被引：21

作者：

AZZOUZ, M ^{[1
]}

DOUCOT, B ^{[1
]}

机构：

[1] CNRS,CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE 9,FRANCE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.47.8660

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A two-dimensional array of weakly coupled antiferromagnetic spin chains is investigated using the Schwinger-boson technique. This method is known to give a good description of integer spins already at the mean-field level. We find that a finite coupling is necessary to introduce long-range antiferromagnetic order, consistently with the presence of a gap for a single chain. The energy gap and spin-spin correlations are calculated. These calculations correspond to the behavior of a nonlinear a model without the one-dimensional topological term.

引用

页码：8660 / 8666

页数：7