Weak-coupling phase diagram of the one-dimensional deformed t-J model
文献类型：期刊论文
| 作者 | Ma, Qingshan1; Dai, Jianhui1; Xu, Zhaoxin1; Zhang, Jun2 |
| 刊名 | MODERN PHYSICS LETTERS A
 |
| 出版日期 | 2007-03-28 |
| 卷号 | 22页码:733-740 |
| 关键词 | deformed t-J lattice model bosonization quantum phase transitions |
| ISSN号 | 0217-7323 |
| 英文摘要 | The deformed t-J lattice model is defined by replacing the fermion operators by the deformed Hubbard operators in the t-term but without changing the J-term in the conventional t-J model. The physics of this model was argued to be continuously connected to those of the t-J one when the deformation parameter lambda varies from zero to unit. In this paper, by using the bosonization field theory and renormalization group technique, we study the phase diagram of the one dimension deformed t-J model in the regime where lambda and J/t are both positively small but comparable to each other. By explicitly incorporating the contributions from the deformation-induced six-particle term and the antiferromagnetic exchange interaction, we find that at half-filling the system shows three distinct ground states characterized by the Luttinger liquid, the spin-density-wave and the bond-order-wave, respectively. These results indicate that the ground state phases of the deformed t-J model is neither connected smoothly to those of the system at lambda=1 nor to those of the conventional t-J model. |
| WOS关键词 | EXTENDED HUBBARD-MODEL ; SUPERCONDUCTIVITY ; TRANSITION ; SYSTEMS ; STATE ; GAS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000251776500031 |
| 出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 源URL | [http://119.78.100.186/handle/113462/27549]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Ma, Qingshan |
| 作者单位 | 1.Zhejiang Univ, Inst Modern Phys, Hangzhou 310027, Peoples R China 2.Xinjiang Univ, Dept Phys, Wurumuqi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Qingshan,Dai, Jianhui,Xu, Zhaoxin,et al. Weak-coupling phase diagram of the one-dimensional deformed t-J model[J]. MODERN PHYSICS LETTERS A,2007,22:733-740. |
| APA | Ma, Qingshan,Dai, Jianhui,Xu, Zhaoxin,&Zhang, Jun.(2007).Weak-coupling phase diagram of the one-dimensional deformed t-J model.MODERN PHYSICS LETTERS A,22,733-740. |
| MLA | Ma, Qingshan,et al."Weak-coupling phase diagram of the one-dimensional deformed t-J model".MODERN PHYSICS LETTERS A 22(2007):733-740. |
入库方式： OAI收割
来源：近代物理研究所
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