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Anomalous Metal-Insulator Transition in Filled Skutterudite CeOs$_4$Sb$_{12}$

Yoshiki Imai·Keitaro Sakurazawa·Tetsuro Saso
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Abstract

Anomalous metal-insulator transition observed in filled skutterudite CeOs$_4$Sb$_{12}$ is investigated by constructing the effective tight-binding model with the Coulomb repulsion between f electrons. By using the mean field approximation, magnetic susceptibilities are calculated and the phase diagram is obtained. When the band structure has a semimetallic character with small electron and hole pockets at $Γ$ and H points, a spin density wave transition with the ordering vector $\mathbf{Q}=(1,0,0)$ occurs due to the nesting property of the Fermi surfaces. Magnetic field enhances this phase in accord with the experiments.

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Yoshiki Imai, Keitaro Sakurazawa, Tetsuro Saso. 2006-01-04. Anomalous Metal-Insulator Transition in Filled Skutterudite CeOs$_4$Sb$_{12}$. https://doi.org/10.1143/jpsj.75.033706

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