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Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model
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 B
ISSN1098-0121
卷号67期号:6页码:-
摘要To describe the spin-orbital energy gap formation in the one-dimensional symmetrically coupled spin-orbital model, we propose a simple mean-field theory based on an SU(4) constraint fermion representation of spins and orbitals. A spin-orbital gapped phase is formed due to a marginally relevant spin-orbital valence bond pairing interaction. The energy gap of the spin and orbital excitations grows extremely slowly from the SU(4)-symmetric point up to a maximum value and then decreases rapidly. By calculating the spin, orbital, and spin-orbital tensor static susceptibilities at zero temperature, we find a crossover from coherent to incoherent magnetic excitations as the spin-orbital coupling decreases from large to small values.
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; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China
关键词Sigma-models Ground-state Systems Liquid Degeneracy Chain
学科领域Physics
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收录类别SCI
WOS记录号WOS:000181501100048
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13364
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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GB/T 7714
Zhang, GM,Hu, H,Yu, L,et al. Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model[J]. PHYSICAL REVIEW B,2003,67(6):-.
APA Zhang, GM,Hu, H,Yu, L,&Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China..(2003).Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model.PHYSICAL REVIEW B,67(6),-.
MLA Zhang, GM,et al."Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model".PHYSICAL REVIEW B 67.6(2003):-.
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