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arXiv 1201.6435cond-mat.supr-con
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铜氧化物超导体CuO2面上电子偶极晶格的存在性

Existence of electronic dipole lattice on CuO2 plane of cuprate superconductor

Hang Dong

摘要:

现有的铜酸盐超导体理论都是以能带理论为基础,几乎都忽略了Cu-O离子在CuO_2平面上的位置差异,并假定离子上的电荷是均匀分布的。考虑到导电的本质是电子的运动,本文中的载流子是指电子。与载流子相反的电荷分布在固定离子上,Cu-O离子的位置差略微违反平均电荷分布,因此空穴的概念不适用。结果表明,在最佳掺杂浓度附近,由于离子的密度相对较低,可以将离子的破坏看作是一种微扰,离子晶格可以看作是规则晶格和偶极晶格的组合。考虑到铜氧化物超导体的性质主要是由偶极晶格决定的,本文简要地解释了成对机制、d波对称性和正常态电阻率的线性温度依赖性。

英文摘要:

The existing theory about the cuprate superconductor bases on band theory, almost all neglects the position difference of Cu-O ions on CuO2 plane, and assumes that the charge on ions are averagely distributed. Considering that the nature of conduction is the moving of electrons, carrier means electron in this article. The charge opposite the carriers distributes on fixed ions, and the position difference of Cu-O ions slightly violates average electricity distribution, so the concept of hole is not suitable. It is proved that, near the optimal doping level, since the density of ions is relatively low, the violations can be treated as a perturbation, and the ion lattice can be seen as a combination of regular lattice and dipole lattice. Considering about that the character of cuprate superconductor is mainly dominated by the dipole lattice, the pairing mechanism, the d-wave symmetry, and the linear temperature dependence of normal state resistivity is tersely interpreted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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