Optical study of interactions in a d-electron Kondo lattice with ferromagnetism

Abstract

We report on a comprehensive optical, transport and thermodynamic study of the Zintl compound Yb${}_{14}$MnSb${}_{11}$, demonstrating that it is the first ferromagnetic Kondo lattice compound in the underscreened limit. We propose a scenerio whereby the combination of Kondo and Jahn-Teller effects provides a consistent explanation of both transport and optical data.

4 pages

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