ON THE ROLE OF APICAL OXYGENS IN HIGH-TC CU-OXIDES

被引：51

作者：

MATSUKAWA, H ^{[1
]}

FUKUYAMA, H ^{[1
]}

机构：

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

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 05期

关键词：

apical oxygens; d-p model; effective Hamiltonian; high-Tc superconductivity; pressure effects; t'; t-J model; theory;

D O I：

10.1143/JPSJ.59.1723

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The role of apical oxygens in high-Tc Cu-oxides has been analyzed based on the effective Hamiltonian derived previously by the present authors. It turns out that these oxygens modulate notably the oxygen p-hole band structure, which leads to the enhancement of the long-range hopping integrals of the Zhang-Rice singlet. This effect is further enhanced if the distance between apical O and in-plane Cu is reduced. This finding may relate to the remarkable experimental result by Murayama et al. of the strong pressure dependence of Tc in the T* structure and its complete absence in the T' structure. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：1723 / 1727

页数：5

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