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题名: Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model
作者: Zhang, GM ;  Hu, H ;  Yu, L
刊名: PHYSICAL REVIEW B
出版日期: 2003
卷号: 67, 期号:6, 页码:-
关键词: SIGMA-MODELS ;  GROUND-STATE ;  SYSTEMS ;  LIQUID ;  DEGENERACY ;  CHAIN
学科分类: Physics
通讯作者: Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000181501100048
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13364
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:
Zhang, GM,Hu, H,Yu, L. Spin-orbital gapped phase with least symmetry breaking in the one-dimensional symmetrically coupled spin-orbital model[J]. PHYSICAL REVIEW B,2003,67(6):-.
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