Effects of randomness in gapped antiferromagnetic quantum spin chains

被引：25

作者：

Yang, K ^{[1
]}

Hyman, RA ^{[1
]}

Bhatt, RN ^{[1
]}

Girvin, SM ^{[1
]}

机构：

[1] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 08期

关键词：

D O I：

10.1063/1.361312

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of bond randomness are studied for spin chains with excitation gaps in the pure case. Systems with enforced topological structure like the spin-1/2 chain with enforced dimerization and spin-1 chain in the Haldane gapped phase appear very stable against randomness. On the other hand, systems with spontaneously generated topological order like the spin-1/2 chain with spontaneous dimerization are found to be unstable even for weak randomness despite the gap. (C) 1996 American Institute of Physics.

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页码：5096 / 5098

页数：3

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