Evolution of 4f electron states in the metal-insulator transition of Pr Ru4 P12

Kazuaki Iwasa; Lijie Hao; Keitaro Kuwahara; Masahumi Kohgi; Shanta Ranjan Saha; Hitoshi Sugawara; Yuji Aoki; Hideyuki Sato; Takashi Tayama; Toshiro Sakakibara

doi:10.1103/PhysRevB.72.024414

Evolution of 4f electron states in the metal-insulator transition of Pr Ru4 P12

Kazuaki Iwasa^*, Lijie Hao, Keitaro Kuwahara, Masahumi Kohgi, Shanta Ranjan Saha, Hitoshi Sugawara, Yuji Aoki, Hideyuki Sato, Takashi Tayama, Toshiro Sakakibara

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

Magnetic excitations of the filled skutterudite Pr Ru4 P12 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 states 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 Pr Ru4 P12.

Original language	English
Article number	024414
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.72.024414
State	Published - 2005/07/01

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Evolution of 4f electron states in the metal-insulator transition of Pr Ru4 P12",

abstract = "Magnetic excitations of the filled skutterudite Pr Ru4 P12 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 states 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 Pr Ru4 P12.",

author = "Kazuaki Iwasa and Lijie Hao and Keitaro Kuwahara and Masahumi Kohgi and Saha, {Shanta Ranjan} and Hitoshi Sugawara and Yuji Aoki and Hideyuki Sato and Takashi Tayama and Toshiro Sakakibara",

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doi = "10.1103/PhysRevB.72.024414",

language = "英語",

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T1 - Evolution of 4f electron states in the metal-insulator transition of Pr Ru4 P12

AU - Iwasa, Kazuaki

AU - Hao, Lijie

AU - Kuwahara, Keitaro

AU - Kohgi, Masahumi

AU - Saha, Shanta Ranjan

AU - Sugawara, Hitoshi

AU - Aoki, Yuji

AU - Sato, Hideyuki

AU - Tayama, Takashi

AU - Sakakibara, Toshiro

PY - 2005/7/1

Y1 - 2005/7/1

N2 - Magnetic excitations of the filled skutterudite Pr Ru4 P12 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 states 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 Pr Ru4 P12.

AB - Magnetic excitations of the filled skutterudite Pr Ru4 P12 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 states 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 Pr Ru4 P12.

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DO - 10.1103/PhysRevB.72.024414

M3 - 学術論文

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SN - 1098-0121

VL - 72

JO - Physical Review B - Condensed Matter and Materials Physics

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IS - 2

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Evolution of 4f electron states in the metal-insulator transition of Pr Ru4 P12

Abstract

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