FLUX PHASE AND DOPING DEPENDENCE OF ANTIFERROMAGNETISM IN COPPER-OXIDE COMPOUNDS
文献类型：期刊论文
| 作者 | FENG, SP |
| 刊名 | PHYSICA C
 |
| 出版日期 | 1994 |
| 卷号 | 232期号:40910页码:119-126 |
| 关键词 | Valence-bond State Mean-field-theory T-j-model Spin-liquid State Heisenberg-model Hubbard-model Doped Antiferromagnet Momentum Distribution Square Lattice Wave-functions |
| ISSN号 | 0921-4534 |
| 英文摘要 | The ground-state properties of copper oxide compounds are studied by using the fermion-spin transformation. At half-filling, there are many possible phases for the 2D Heisenberg model and the mean-field state with the lowest energy is the magnetized pi-flux state. It is shown that the mean-field ground state of the 2D XY model is a uniform pi-flux phase with no staggered antiferromagnetic long-range order, and a reasonable result is also obtained for the 2D anisotropic Heisenberg model. In the mean-field level, the quantum fluctuation and frustration of spins can be considered by introducing the next-nearest-neighbor magnetic exchange interaction J', the antiferromagnetic long-range order is destroyed at half-fitting within the J-J' model where the value of J' is larger than the critical value J'(c) = 0.24J. Away from half-filling, the antiferromagnetic long-range order is destroyed for a hole concentration less than approximately 4.3%-7% for reasonable values of the parameters J'/J = 0.05 and t/J = 3-5 within the t-J-J' model, which is in good agreement with the experiments on copper oxide superconductors. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/11844]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | FENG, SP. FLUX PHASE AND DOPING DEPENDENCE OF ANTIFERROMAGNETISM IN COPPER-OXIDE COMPOUNDS[J]. PHYSICA C,1994,232(40910):119-126. |
| APA | FENG, SP.(1994).FLUX PHASE AND DOPING DEPENDENCE OF ANTIFERROMAGNETISM IN COPPER-OXIDE COMPOUNDS.PHYSICA C,232(40910),119-126. |
| MLA | FENG, SP."FLUX PHASE AND DOPING DEPENDENCE OF ANTIFERROMAGNETISM IN COPPER-OXIDE COMPOUNDS".PHYSICA C 232.40910(1994):119-126. |
入库方式： OAI收割
来源：理论物理研究所
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