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题名: Antiferromagnetic Heisenberg ladders in staggered magnetic field
作者: Zhao, J ;  Wang, XQ ;  Xiang, T ;  Su, ZB ;  Yu, L ;  Lou, JZ ;  Chen, CF
刊名: PHYSICAL REVIEW B
出版日期: 2006
卷号: 73, 期号:1, 页码:-
关键词: DIMENSIONAL S=1/2 ANTIFERROMAGNET ;  QUANTUM RENORMALIZATION-GROUPS ;  HALDANE-GAP ;  EDGE STATES ;  SPIN CHAIN ;  YB4AS3 ;  MODEL
学科分类: Physics
通讯作者: Zhao, J , Renmin Univ, Dept Phys, Beijing 100872, Peoples R China
部门归属: Renmin Univ, 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; Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA
英文摘要: We study the low-energy excitations of the spin-1/2 antiferromagnetic Heisenberg chain and N-leg (N = 2,3,4) ladders in a staggered magnetic field h(s). We show that hs induces gap and midgap states in all the cases and we will examine their field scaling behavior. A modified boundary scheme is devised to extract accurate bulk excitation behavior. The gap values converge rapidly as N increases, leading to a field scaling exponent gamma=1/2 for both the longitudinal and transverse gaps of the square lattice (N ->infinity). The midgap states induced by the boundary edge effects share the bulk gap scaling exponents but their overall scaling behavior in the large-N limit needs further investigation.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000235009000019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/6062
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, J,Wang, XQ,Xiang, T,et al. Antiferromagnetic Heisenberg ladders in staggered magnetic field[J]. PHYSICAL REVIEW B,2006,73(1):-.
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