SPIN-WAVE THEORY OF THE HALDANE GAP IN ONE-DIMENSIONAL ANTIFERROMAGNETS

被引：23
|
作者：
REZENDE, SM
机构：
[1] Departamento de Física, Universidade Federal de Pernambuco, 50739 Recife, Pernambuco
来源：
PHYSICAL REVIEW B | 1990年 / 42卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.42.2589
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We point out that spin-wave theory with the additional constraint introduced by Hirsch and Tang predicts a gap in the spectrum of one-dimensional isotropic antiferromagnets at T=0, in agreement with the Haldane result for S=1. At finite temperatures the gap is comparable to the experimental values in CsNiCl3. © 1990 The American Physical Society.
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页码：2589 / 2590
页数：2
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