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题名: Effects of the Dzyaloshinskii-Moriya interaction on low-energy magnetic excitations in copper benzoate
作者: Zhao, JZ ;  Wang, XQ ;  Xiang, T ;  Su, ZB ;  Yu, L
刊名: PHYSICAL REVIEW LETTERS
出版日期: 2003
卷号: 90, 期号:20, 页码:-
关键词: FIELD-INDUCED GAP ;  DIMENSIONAL S=1/2 ANTIFERROMAGNET ;  CU BENZOATE ;  YB4AS3 ;  CHAIN ;  MODEL
学科分类: Physics
通讯作者: Zhao, JZ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China; Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
英文摘要: We have investigated the physical effects of the Dzyaloshinskii-Moriya (DM) interaction in copper benzoate. In the low-field limit, the spin gap is found to vary as H(2/3)ln(1/6)(J/mu(B)H(s)) (H-s: an effective staggered field induced by the external field H) in agreement with the prediction of conformal field theory, while the staggered magnetization varies as H-1/3 and the ln(1/3)(J/mu(B)H(s)) correction predicted by conformal field theory is not confirmed. The linear scaling relation between the momentum shift and the magnetization is broken. We have determined the coupling constant of the DM interaction and have given a complete quantitative account for the field dependence of the spin gaps along all three principal axes, without resorting to additional interactions such as interchain coupling. A crossover to strong applied field behavior is predicted for further experimental verification.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000183115200050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13288
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhao, JZ,Wang, XQ,Xiang, T,et al. Effects of the Dzyaloshinskii-Moriya interaction on low-energy magnetic excitations in copper benzoate[J]. PHYSICAL REVIEW LETTERS,2003,90(20):-.
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