Random spin-1 quantum chains

被引：39

作者：

Boechat, B ^{[1
]}

Saguia, A ^{[1
]}

Continentino, MA ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 98卷 / 05期

关键词：

disordered systems; phase transitions; thermodynamic properties;

D O I：

10.1016/0038-1098(96)00082-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study disordered spin-1 quantum chains with random exchange and biquadratic interactions using a real space renormalization group approach. We find that the dimerized phase of the pure biquadratic model is unstable and gives rise to a random singlet phase in the presence of weak disorder. In the Haldane region of the phase diagram we obtain a quite different behavior.

引用

页码：411 / 416

页数：6

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