Phase separation and enhanced charge-spin coupling near magnetic transitions

被引：31

作者：

Guinea, F ^{[1
]}

Gómez-Santos, G

Arovas, DP

机构：

[1] CSIC, Inst Ciencia Mat, Madrid 28049, Spain

[2] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain

[3] Univ Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, Spain

[4] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.62.391

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The generic changes of the electronic compressibility in systems which show magnetic instabilities are studied within a mean-field approach. It is shown that, when going into the ordered phase, the inverse compressibility is reduced by an amount comparable to its original value, making charge instabilities also possible. We discuss, within this framework, the tendency towards phase separation of the double-exchange systems, the pyrochlores, and the magnetic transitions of the Hubbard model.

引用

收藏

页码：391 / 401

页数：11

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