Impurity induced antiferromagnetism in spin-1/2 Heisenberg two-leg ladder systems

被引：76

作者：

Fukuyama, H ^{[1
]}

Nagaosa, N ^{[1
]}

Saito, M ^{[1
]}

Tanimoto, T ^{[1
]}

机构：

[1] UNIV TOKYO, DEPT APPL PHYS, TOKYO 113, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 08期

关键词：

antiferromagnetic long range order; two-leg ladder spin systems; impurity effect; phase Hamiltonian; Sr(Cu1-xZnx)(2)O-3;

D O I：

10.1143/JPSJ.65.2377

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on the phase Hamiltonian representation of a spin-1/2 Heisenherg two-leg ladder system coupled antiferromagnetically, which has a spin gap if clean, it is shown that a non-magnetic impurity replacing a spin induces a staggered spin modulation. This results in the long range order of antiferromagnetism in the presence of three-dimensional coupling between the ladders. This will be in accordance with a recent experimental observation by Azuma et al. on Sr(Cu1-xZnx)(2)O-3.

引用

页码：2377 / 2380

页数：4

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