Ferromagnetism and Kondo Insulator Behavior in the Disordered Periodic Anderson Model

Details Ferromagnetism and Kondo Insulator Behavior in the Disordered Periodic Anderson Model Ferromagnetism and Kondo Insulator Behavior in the Disordered Periodic Anderson Model

2008-01-25

arxiv.org/abs/0801.3934v1

Phys. Rev. Lett. 100, 246401 (2008).

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.246401

The effect of binary alloy disorder on the ferromagnetic phases of f-electron materials is studied within the periodic Anderson model. We find that disorder in the conduction band can drastically enhance the Curie temperature due to an increase of the local f-moment. The effect may be explained qualitatively and even quantitatively by a simple theoretical ansatz. The emergence of an alloy Kondo insulator at non-integer filling is also pointed out.

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