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Zhao, J; Wang, XQ; Xiang, T; Su, ZB; Yu, L; Lou, JZ; Chen, CF; Zhao, J , Renmin Univ, Dept Phys, Beijing 100872, Peoples R China
Antiferromagnetic Heisenberg ladders in staggered magnetic field
Source PublicationPHYSICAL REVIEW B
KeywordDimensional S=1/2 Antiferromagnet Quantum Renormalization-groups Haldane-gap Edge States Spin Chain Yb4as3 Model
AbstractWe 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.
2006
ISSN1098-0121
Volume73Issue:1Pages:-
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/6062
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhao, J , Renmin Univ, Dept Phys, Beijing 100872, Peoples R China
Recommended Citation
GB/T 7714
Zhao, J,Wang, XQ,Xiang, T,et al. Antiferromagnetic Heisenberg ladders in staggered magnetic field[J]. PHYSICAL REVIEW B,2006,73(1):-.
APA Zhao, J.,Wang, XQ.,Xiang, T.,Su, ZB.,Yu, L.,...&Zhao, J , Renmin Univ, Dept Phys, Beijing 100872, Peoples R China.(2006).Antiferromagnetic Heisenberg ladders in staggered magnetic field.PHYSICAL REVIEW B,73(1),-.
MLA Zhao, J,et al."Antiferromagnetic Heisenberg ladders in staggered magnetic field".PHYSICAL REVIEW B 73.1(2006):-.
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