Charge dynamics near the electron-correlation induced metal-insulator transition in pyrochlore-type molybdates

I. Kézsmárki, N. Hanasaki, D. Hashimoto, S. Iguchi, Y. Taguchi, S. Miyasaka, Y. Tokura

研究成果: Article査読

35 被引用数 (Scopus)

抄録

The charge dynamics of the bandwidth controlled metal-insulation transition (MIT) in pyrochlore R2Mo2O7 (R = Nd, Sm, Dy, and Ho) single crystals was investigated using the measurements of dc and optical conductivity. The importance of 4d electron correlation in driving the MIT phenomena was also investigated. It was observed that with changing the ionic radius (r) of R or equivalently the one-electron bandwidth, the T = 0 K MIT occurred at rc ≈ r, where rc is the critical value of the rare-earth ionic radius. It was also observed that the change in the electronic state and scattering in sample single crystals was due to the zero-temperature quantum MIT.

本文言語English
論文番号266401
ジャーナルPhysical review letters
93
26 I
DOI
出版ステータスPublished - 2004 12 31
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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