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Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model
Zhang, GM; Gu, Q; Yu, L; Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
2000
发表期刊PHYSICAL REVIEW B
ISSN0163-1829
卷号62期号:1页码:69-72
摘要A simplified version of the symmetric Kondo lattice model, the Kondo necklace model, is studied by using a representation of impurity and conduction electron spins in terms of local Kondo singlet and triplet operators. Within a mean-field theory, a spin gap always appears in the spin triplet excitation spectrum in one dimension (1D), leading to a Kondo spin liquid state for any finite values of coupling strength t/J (with t as hopping and J as exchange); in 2D and 3D cubic lattices the spin gaps are found to Vanish continuously around (t/J)(c)approximate to 0.70 and (t/J)(c)approximate to 0.38, respectively, where quantum phase transitions occur and the Kondo spin liquid state changes into an antiferromagnetically long-range ordered state. These results are in agreement with variational Monte Carlo, higher-order series expansion, and recent quantum Monte Carlo calculations for the symmetric Kondo lattice model.
部门归属Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China; Int Ctr Theoret Phys, I-34100 Trieste, Italy; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Periodic Anderson Model Lattice Model One Dimension Ground-state
学科领域Physics
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收录类别SCI
WOS记录号WOS:000088037000018
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被引频次:37[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/311006/12945
专题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,Gu, Q,Yu, L,et al. Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model[J]. PHYSICAL REVIEW B,2000,62(1):69-72.
APA Zhang, GM,Gu, Q,Yu, L,&Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China..(2000).Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model.PHYSICAL REVIEW B,62(1),69-72.
MLA Zhang, GM,et al."Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model".PHYSICAL REVIEW B 62.1(2000):69-72.
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