Kondo spin liquid and magnetically long-range ordered states in the Kondo necklace model
文献类型：期刊论文
| 作者 | Zhang, GM; Gu, Q; Yu, L ; Zhang, GM , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
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| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2000 |
| 卷号 | 62期号:1页码:69-72 |
| 关键词 | Periodic Anderson Model Lattice Model One Dimension Ground-state |
| ISSN号 | 0163-1829 |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000088037000018 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/12945]  |
| 专题 | 理论物理研究所_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. |
| 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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来源：理论物理研究所
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