CHARGE-FLUCTUATION MEDIATED D(XY) PAIRING FOR HIGH-T(C) SUPERCONDUCTIVITY

被引：14

作者：

TSUJI, T

NARIKIYO, O

MIYAKE, K

机构：

[1] Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka

来源：

PHYSICA C | 1994年 / 226卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90213-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effective interaction for the spin-singlet Cooper pairs is calculated using the two-dimensional d-p model for high-T(c) cuprates on the basis of a renormalized perturbation of the Fermi liquid: first forming the quasiparticles variationally by the Gutzwiller approximation, then treating the residual interactions among quasiparticles by the RPA. In the charge-fluctuation region, where the p hole is moderately doped and the repulsive interaction (U(pd)) between the nearest-neighbor p and d sites is the dominant parameter, the interaction for d(xy) pairs is attractive, while it is repulsive both for extended-s and d(x2-y2) pairs. The on-site repulsive interaction for p electrons (U(p)) is compatible with this tendency, whereas the one for d electrons (U(d)) is incompatible.

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页码：333 / 340

页数：8

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