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Zhang, GM; Gu, Q; Yu, L; Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model
Source PublicationPHYSICAL REVIEW B
KeywordPeriodic Anderson Model Lattice Model One Dimension Ground-state
AbstractA 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.
2000
ISSN0163-1829
Volume62Issue:1Pages:69-72
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12945
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
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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