Schwinger-boson mean-field theory of the Heisenberg ferrimagnetic spin chain
文献类型：期刊论文
| 作者 | Wu, CJ; Chen, B; Dai, X; Yu, Y ; Su, ZB; Wu, CJ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
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| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 1999 |
| 卷号 | 60期号:2页码:1057-1063 |
| 关键词 | Low-temperature Properties Dynamics States Model |
| ISSN号 | 0163-1829 |
| 英文摘要 | The Schwinger-boson mean-field theory is applied to the quantum ferrimagnetic Heisenberg chain. There is a ferrimagnetic long-range order in the ground state. We observe two branches of the low-lying excitation and calculate the spin reduction, the gap of the antiferromagnetic branch, and the spin fluctuation at T=0 K. These results agree with the established numerical results quite well. At finite temperatures, the long-range order is destroyed because of the disappearance of the Bose condensation. The thermodynamic observables, such as the free energy, magnetic susceptibility, specific heat, and the spin correlation at T>0 K, are calculated. The T chi(uni) has a minimum at intermediate temperatures and the spin-correlation length behaves as T-1 at low temperatures. These qualitatively agree with the numerical results and the difference is small at low temperatures. [S0163-1829(99)07225-2]. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000081563800050 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13125]  |
| 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 | Wu, CJ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wu, CJ,Chen, B,Dai, X,et al. Schwinger-boson mean-field theory of the Heisenberg ferrimagnetic spin chain[J]. PHYSICAL REVIEW B,1999,60(2):1057-1063. |
| APA | Wu, CJ,Chen, B,Dai, X,Yu, Y,Su, ZB,&Wu, CJ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China..(1999).Schwinger-boson mean-field theory of the Heisenberg ferrimagnetic spin chain.PHYSICAL REVIEW B,60(2),1057-1063. |
| MLA | Wu, CJ,et al."Schwinger-boson mean-field theory of the Heisenberg ferrimagnetic spin chain".PHYSICAL REVIEW B 60.2(1999):1057-1063. |
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来源：理论物理研究所
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