Field-induced gap in S = 1/2 antiferromagnetic chains

被引：325

作者：

Oshikawa, M ^{[1
]}

Affleck, I ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA, CANADIAN INST ADV RES, VANCOUVER, BC V6T 1Z1, CANADA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.79.2883

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a recent neutron-scattering experiment on the quasi-one-dimensional S = 1/2 antiferromagnet Cu benzoate, a gap was induced by an applied magnetic field. We argue that the primary mechanism of the gap formation is an effective staggered field due to both the alternating g-tensor and the Dzyaloshinskii-Moriya interaction. We explain the dependence of the gap on the applied field, as well as identify several peaks in the structure factor S(q, omega).

引用

页码：2883 / 2886

页数：4

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