Evolution of 4f-Electron States in the Metal-Insulator Transition of PrRu$_4$P$_{12}$

Details Evolution of 4f-Electron States in the Metal-Insulator Transition of PrRu$_4$P$_{12}$ Evolution of 4f-Electron States in the Metal-Insulator Transition of PrRu$_4$P$_{12}$

2005-05-05

arxiv.org/abs/cond-mat/0505121v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 6 figures, 1 table. Accepted by Phys. Rev. B

Scientific paper

10.1103/PhysRevB.72.024414

Magnetic excitations of the filled skutterudite PrRu4P12 exhibiting a metal-insulator (M-I) transition at TM-I= 63 K were studied by inelastic neutron scattering experiment. The spectra at temperatures much lower than TM-I are described as well-defined crystal-field excitations. With approaching TM-I, the excitation peaks broaden and shift considerably together with the temperature variation of the carrier number and the atomic displacement in the transition. The 4f-electron state evolve from the well localized state in the insulator phase to the strongly hybridized itinerant state by p-f mixing near TM-I. The hybridization is responsible for the M-I transition of PrRu4P12.

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