Random bonds and topological stability in gapped quantum spin chains

被引：119

作者：

Hyman, RA ^{[1
]}

Yang, K ^{[1
]}

Bhatt, RN ^{[1
]}

Girvin, SM ^{[1
]}

机构：

[1] PRINCETON UNIV,DEPT ELECT ENGN,PRINCETON,NJ 08544

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.76.839

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using an asymptotically exact real space renormalization procedure, we find that the dimerized spin-1/2 chain is extremely stable against bond randomness. For weak dimerization or, equivalently, strong randomness, it is in a Griffiths phase with short-range spin-spin correlations and a divergent susceptibility. The string topological order persists. We conjecture that random integer spin chains in the Haldane phase exhibit similar thermodynamic and topological properties.

引用

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页码：839 / 842

页数：4

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