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Effects of the Dzyaloshinskii-Moriya interaction on low-energy magnetic excitations in copper benzoate
Zhao, JZ; Wang, XQ; Xiang, T; Su, ZB; Yu, L; Zhao, JZ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2003
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号90期号:20页码:-
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.
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
关键词Field-induced Gap Dimensional S=1/2 Antiferromagnet Cu Benzoate Yb4as3 Chain Model
学科领域Physics
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收录类别SCI
WOS记录号WOS:000183115200050
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13288
专题理论物理所SCI论文
通讯作者Zhao, JZ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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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):-.
APA Zhao, JZ,Wang, XQ,Xiang, T,Su, ZB,Yu, L,&Zhao, JZ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2003).Effects of the Dzyaloshinskii-Moriya interaction on low-energy magnetic excitations in copper benzoate.PHYSICAL REVIEW LETTERS,90(20),-.
MLA Zhao, JZ,et al."Effects of the Dzyaloshinskii-Moriya interaction on low-energy magnetic excitations in copper benzoate".PHYSICAL REVIEW LETTERS 90.20(2003):-.
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