CHARGE-TRANSFER INSTABILITY AND SUPERCONDUCTIVITY

被引：2

作者：

MIYANAGA, A

HASEGAWA, Y

FUKUYAMA, H

机构：

[1] HIMEJI INST TECHNOL,FAC SCI,DEPT MAT SCI,KAMIGORI,HYOGO 67812,JAPAN

[2] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

来源：

PHYSICA C | 1991年 / 185卷 / pt 3期

关键词：

D O I：

10.1016/0921-4534(91)90950-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconductivity in the system near charge transfer instability is investigated for CuO2 layer structure. By treating the transfer between Cu and O perturbatively, the effective interaction of O holes is derived and the possible symmetries of superconductivity is studied. The critical temperatures of superconductivity are estimated as a function of the doping rate, delta, based on weak-coupling approximation and are found to have characteristic delta-dependences depending on symmetry. We also examined the possible ground states with n = 1, 2, 3 or 4 holes for a wide range of the Coulomb repulsions on Cu sites and O sites.

引用

收藏

页码：1647 / 1648

页数：2

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