Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction
文献类型：期刊论文
| 作者 | Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.; Dai, JH; Feng, XY; Xiang, T ; Yu, Y
|
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2004 |
| 卷号 | 70期号:6页码:- |
| 关键词 | Matrix Renormalization-group T-j Model Phase-diagram Superconductivity Transition Systems Lattice Waves Chain |
| ISSN号 | 1098-0121 |
| 英文摘要 | We study the phase diagram of a one-dimensional extended Hubbard model with antiferromagnetic exchange interaction analytically and numerically. The bosonization and transfer-matrix renormalization group methods are used in the corresponding coupling regimes. At half-filling, the system is a Mott insulator with a finite spin excitation gap if the on-site Coulomb repulsion is fairly smaller than the antiferromagnetic exchange J. This Mott insulator is characterized by the bond-charge-density-wave order or spontaneously dimerization. In the weak-coupling regime where the spin-charge separation holds approximately, the critical point separating the gapless and gapped spin liquid phases is U(c)similar toJ/2. However, as J increases, the spin-charge couplings become important and the critical point U(c) is significantly suppressed and eventually tends to zero as J-->infinity. Away from half-filling, the charge gap completely collapses but the spin gap persists. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000223716300083 |
| 公开日期 | 2012-08-30 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14033]  |
| 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 | Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.,Dai, JH,Feng, XY,et al. Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction[J]. PHYSICAL REVIEW B,2004,70(6):-. |
| APA | Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.,Dai, JH,Feng, XY,Xiang, T,&Yu, Y.(2004).Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction.PHYSICAL REVIEW B,70(6),-. |
| MLA | Dai, JH , Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.,et al."Gapped spin-liquid states in a one-dimensional Hubbard model with antiferromagnetic exchange interaction".PHYSICAL REVIEW B 70.6(2004):-. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。