DOPING DEPENDENCE OF HOLE DISTRIBUTION IN CUO2 PLANES OF HIGH-TC SUPERCONDUCTORS - LOCAL ANSATZ VERSUS EXACT RESULTS

被引：21

作者：

DUTKA, J

OLES, AM

机构：

[1] Institute of Physics, Jagellonian University

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.42.105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hole distribution within a CuO2 plane, a common structural element of high-temperature superconductors, is investigated as a function of doping by holes. The correlated ground state of a three-band Hubbard model is found by making use of a local ansatz which includes local correlations between holes. It is found that doped holes have 70% oxygen character for the parameters determined from the local-density approximation, in agreement with experimental observations, while hole droplets on oxygen orbitals are formed for large copper-oxygen Coulomb repulsion, Udp. All our results agree with those obtained from finite-cluster diagonalization. © 1990 The American Physical Society.

引用

页码：105 / 109

页数：5

共 40 条

[21] HOW STRONGLY ARE ELECTRONS CORRELATED IN THE HIGH-TC SUPERCONDUCTING MATERIALS [J].