FERROMAGNETIC INSTABILITY IN A MEAN-FIELD SLAVE-BOSON APPROACH FOR THE ANDERSON LATTICE

被引:17
作者
DORIN, V [1 ]
SCHLOTTMANN, P [1 ]
机构
[1] FLORIDA STATE UNIV,CTR MAT RES & TECHNOL,TALLAHASSEE,FL 32306
关键词
D O I
10.1063/1.354045
中图分类号
O59 [应用物理学];
学科分类号
摘要
We consider a stoichiometric metallic Anderson lattice with orbital degeneracy in the U --> infinity limit. A Gutzwiller type of mean-field approximation is formulated m terms of three slave bosons per site in analogy to Kotliar and Ruckenstein's approach for the Hubbard model. In the orbitally nondegenerate case the paramagnetic solution becomes unstable towards ferromagnetism if the valence is smaller than a critical one. This instability is suppressed with increasing orbital degeneracy.
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页码:5400 / 5402
页数:3
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