Magnetism in disordered spin-Peierls systems

被引：1

作者：

Saito, M ^{[1
]}

Fukuyama, H ^{[1
]}

机构：

[1] Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICA B | 1998年 / 246卷

基金：

日本学术振兴会;

关键词：

spin-Peierls systems; antiferromagnetism; disorder; spin wave;

D O I：

10.1016/S0921-4526(98)00020-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic excitations in disordered spin-Peierls systems are investigated theoretically. Reflecting the characteristic properties of the ground state, where the true long-range orders of antiferromagnetism and spin-Peierls lattice dimerization coexist with spatially varying order parameters, two kinds of excitations with intrinsic mode broadenings are found. They are acoustic antiferromagnetic (AF) spin wave mode and gapped spin-Peierls (SP) lattice distortion mode. The effects of magnetic field is also discussed. These results are compared with experimental results. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：27 / 31

页数：5

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