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Topological effects in short antiferromagnetic Heisenberg chains
Lou, JZ; Qin, SJ; Ng, TK; Su, ZB; Lou, JZ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2002
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号65期号:10页码:-
摘要The manifestations of topological effects in finite antiferromagnetic Heisenberg chains are examined by density-matrix renormalization-group techniques. We find that the difference between integer and half-integer spin chains shows up in ground-state energy per site when the length of the spin chain is longer than similar toxi, where xisimilar toexp(piS) is a spin-spin correlation length, for spin magnitudes S up to 5/2. For open chains with spin magnitudes S=5/2 to S=5, we verify that end states with fractional spin quantum numbers S' exist and are visible in the structure of the low-energy excitation spectrum even when the chain length is much smaller than the correlation length xi. The robustness of end states points to the possibility of the existence of general hidden topological order in quantum spin chains with spin magnitudes Sgreater than or equal to1.
部门归属Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China
关键词Quantum Spin Chains Renormalization-groups Sigma-model Edge States Symmetry Energy
学科领域Physics
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收录类别SCI
WOS记录号WOS:000174548300055
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13584
专题理论物理所1978-2010年知识产出
通讯作者Lou, JZ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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Lou, JZ,Qin, SJ,Ng, TK,et al. Topological effects in short antiferromagnetic Heisenberg chains[J]. PHYSICAL REVIEW B,2002,65(10):-.
APA Lou, JZ,Qin, SJ,Ng, TK,Su, ZB,&Lou, JZ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2002).Topological effects in short antiferromagnetic Heisenberg chains.PHYSICAL REVIEW B,65(10),-.
MLA Lou, JZ,et al."Topological effects in short antiferromagnetic Heisenberg chains".PHYSICAL REVIEW B 65.10(2002):-.
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