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

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 $\Gamma$ 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.

4 pages, 4 figures

References in corpus (6)

• Transport properties in CeOs${}_4$Sb${}_{12}$: Possibility of the ground state being semiconducting
• Field-induced phase transitions in a Kondo insulator
• Field induced magnetic ordering transition in Kondo insulators
• Novel Phase Transition Near the Quantum Critical Point in the Filled-Skutterudite Compound CeOs4Sb12: an Sb-NQR Study
• Magnetic-Field-Induced Antiferromagnetism in Two-Dimensional Hubbard Model: Analysis of CeRhIn${}_5$
• Optical conductivity of filled skutterudites

Cited by in corpus (3)

• Distinct Kondo Screening Behaviors in Heavy Fermion Filled Skutterudites with 4f1 and 4f2 Configurations
• Calculation of Optical Conductivity, Resistivity and Thermopower of Filled Skutterudite CeRu${}_4$Sb${}_{12}$ based on a Realistic Tight-binding Model with Strong Correlation
• Anomalous magnetic phase diagram in low-carrier two-band systems and possible application to CeOs4Sb12