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题名: Topological effects in short antiferromagnetic Heisenberg chains
作者: Lou, JZ ;  Qin, SJ ;  Ng, TK ;  Su, ZB
刊名: PHYSICAL REVIEW B
出版日期: 2002
卷号: 65, 期号:10, 页码:-
关键词: QUANTUM SPIN CHAINS ;  RENORMALIZATION-GROUPS ;  SIGMA-MODEL ;  EDGE STATES ;  SYMMETRY ;  ENERGY
学科分类: Physics
通讯作者: Lou, JZ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000174548300055
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13584
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:
Lou, JZ,Qin, SJ,Ng, TK,et al. Topological effects in short antiferromagnetic Heisenberg chains[J]. PHYSICAL REVIEW B,2002,65(10):-.
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