Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model

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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
发表期刊	PHYSICAL REVIEW B
关键词	Periodic Anderson Model Lattice Model One Dimension Ground-state
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.
	2000
ISSN	0163-1829
卷号	62 期号:1 页码:69-72
学科领域	Physics
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/12945
专题	理论物理所科研产出_SCI论文
通讯作者	Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
推荐引用方式 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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