Coherent-incoherent crossover of charge dynamics in the ferromagnetic ground state of manganites: R0.6Sr0.4MnO3(R = La - Sm)

E. Saitoh, Y. Okimoto, Y. Tomioka, T. Katsufuji, Y. Tokura

研究成果: Article査読

37 被引用数 (Scopus)

抄録

Low-energy optical spectra and their temperature dependence have been investigated for single crystals of perovskite-type manganese oxides, R1-xSrxMnO3, at a fixed doping level (x=0.4) but with varying perovskite R species or one-electron bandwidth (W). Variation of the optical conductivity spectra with a change of R, such as a diminishment of the Drude peak and the emergence of a nearly ω-independent component, indicates a coherent-incoherent crossover of charge dynamics in the ferromagnetic metallic phase. This cannot be accounted for in terms of simple change in carrier mass or scattering rate, but indicates the importance of competitive instabilities triggered by decreasing W against the double-exchange interaction near the charge/orbital-ordering instability.

本文言語English
ページ(範囲)10362-10366
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
60
14
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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「Coherent-incoherent crossover of charge dynamics in the ferromagnetic ground state of manganites: R<sub>0.6</sub>Sr<sub>0.4</sub>MnO<sub>3</sub>(R = La - Sm)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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