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Valence-bond spin-liquid state in two-dimensional frustrated spin-1/2 Heisenberg antiferromagnets
Zhang, GM; Hu, H; Yu, L; Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
2003
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号91期号:6页码:-
摘要Fermionic valence-bond approach in terms of SU(4) representation is proposed to describe the J(1)-J(2) frustrated Heisenberg antiferromagnetic (AF) model on a bipartite square lattice. A uniform mean field solution without breaking the translational and rotational symmetries describes a valence-bond spin-liquid state, interpolating the two different AF ordered states in the large J(1) and large J(2) limits, respectively. This novel spin-liquid state is gapless with the vanishing density of states at the Fermi nodal points. Moreover, a sharp resonance peak in the dynamic structure factor is predicted for momenta q=(0,0) and (pi,pi) in the strongly frustrated limit J(2)/J(1)similar to1/2, which can be checked by neutron scattering experiments.
部门归属Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China; Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Mean-field Theory Quantum Antiferromagnets Dimer Order Model Phase Superconductivity Lattice
学科领域Physics
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收录类别SCI
WOS记录号WOS:000184678200048
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被引频次:15[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/311006/13247
专题理论物理所1978-2010年知识产出
通讯作者Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
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Zhang, GM,Hu, H,Yu, L,et al. Valence-bond spin-liquid state in two-dimensional frustrated spin-1/2 Heisenberg antiferromagnets[J]. PHYSICAL REVIEW LETTERS,2003,91(6):-.
APA Zhang, GM,Hu, H,Yu, L,&Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China..(2003).Valence-bond spin-liquid state in two-dimensional frustrated spin-1/2 Heisenberg antiferromagnets.PHYSICAL REVIEW LETTERS,91(6),-.
MLA Zhang, GM,et al."Valence-bond spin-liquid state in two-dimensional frustrated spin-1/2 Heisenberg antiferromagnets".PHYSICAL REVIEW LETTERS 91.6(2003):-.
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