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Field-induced midgap edge excitations in quantum spin chains
Lou, JZ; Chen, CF; Wang, XQ; Lou, JZ , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
2006
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号73期号:9页码:-
摘要A recent study [J. Lou, , Phys. Rev. Lett. 94, 217207 (2005)] reveals that topological edge effects induce bound midgap states in antiferromagnetic Heisenberg chains with a staggered magnetic field. We report density matrix renormalization group calculations that examine the effects of high magnetic field on the gap and midgap states and the range of validity of the field theory prediction on their scaling behavior. We also investigate the effects of the site parity (i.e., even or odd number of sites in the chain), the dilution of the spin chain by dopant atoms, and the uniform magnetic field on the emergence and evolution of the midgap states. The results provide useful insights into the behavior of the edge excitations in spin chain materials, which should facilitate the comparison between theory and experiment and stimulate further investigations.
部门归属Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA; Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China
关键词Dimensional S=1/2 Antiferromagnet Copper Benzoate Magnetic-field Weak Ferromagnetism Linear-chain Induced Gap Yb4as3
学科领域Physics
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收录类别SCI
WOS记录号WOS:000236467100017
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/6035
专题理论物理所SCI论文
通讯作者Lou, JZ , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
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Lou, JZ,Chen, CF,Wang, XQ,et al. Field-induced midgap edge excitations in quantum spin chains[J]. PHYSICAL REVIEW B,2006,73(9):-.
APA Lou, JZ,Chen, CF,Wang, XQ,&Lou, JZ , Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.(2006).Field-induced midgap edge excitations in quantum spin chains.PHYSICAL REVIEW B,73(9),-.
MLA Lou, JZ,et al."Field-induced midgap edge excitations in quantum spin chains".PHYSICAL REVIEW B 73.9(2006):-.
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