Effective Hubbard model for Zn-doped CuO2 plane

被引：0

作者：

Z. Kovacevic

R. Hayn

N.M. Plakida

机构：

[1] University of Montenegro,Faculty of Natural Science and Mathematics

[2] University of Technology Dresden,Institute for Theoretical Physics

[3] Joint Institute for Nuclear Research,undefined

[4] Max Planck Institut for the Physics of Complex Systems,undefined

来源：

The European Physical Journal B - Condensed Matter and Complex Systems | 1999年 / 10卷

关键词：

PACS. 71.27.+a Strongly correlated electron systems; heavy fermions - 71.55.-i Impurity and defect levels - 74.72.-h High- compounds;

D O I：

暂无

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学科分类号：

摘要：

In the framework of the cell-perturbation method for the original p-d model an effective two-band Hubbard model for the CuO2 plane with Zn impurities is derived. Zn impurities are modelled by Wannièr oxygen one-hole states at vacant Cu sites. The model is based on the results of band structure calculations carried out within the local-density approximation. Further reduction to an extended t-J model shows a large ferromagnetic superexchange interaction between the Cu spin with the nearest virtual oxygen spin in the Zn cell.

引用

页码：487 / 495

页数：8