Universality class of an S=1/2 quantum spin ladder system with four-spin exchange -: art. no. 104413

被引：29

作者：

Hijii, K ^{[1
]}

Nomura, K ^{[1
]}

机构：

[1] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.65.104413

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study a s=1/2 Heisenberg spin ladder with four-spin exchange. Combining numerical results with conformal field theory, we find a phase transition with central charge c=3/2. Since this system has an SU(2) symmetry, we can conclude that this critical theory is described by k=2 SU(2) Wess-Zumino-Witten model with Z(2) symmetry breaking.

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页码：1 / 6

页数：6

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