Strongly Correlated Cerium Systems: Non-Kondo Mechanism for Moment Collapse

Details Strongly Correlated Cerium Systems: Non-Kondo Mechanism for Moment Collapse Strongly Correlated Cerium Systems: Non-Kondo Mechanism for Moment Collapse

2000-02-07

arxiv.org/abs/cond-mat/0002107v1

Physics

Condensed Matter

Strongly Correlated Electrons

A shorter version of this has been submitted to PRL

Scientific paper

10.1103/PhysRevB.62.11533

We present an ab initio based method which gives clear insight into the interplay between the hybridization, the coulomb exchange, and the crystal-field interactions, as the degree of 4f localization is varied across a series of strongly correlated cerium systems. The results for the ordered magnetic moments, magnetic structure, and ordering temperatures are in excellent agreement with experiment, including the occurence of a moment collapse of non-Kondo origin. In contrast, standard ab initio density functional calculations fail to predict, even qualitatively, the trend of the unusual magentic properties.

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