Transport properties of the delafossite Rh oxide Cu1-x Agx Rh1-y Mgy O2: Effect of Mg substitution on the resistivity and Hall coefficient

S. Shibasaki, Wataru Kobayashi, I. Terasaki

    研究成果: Article

    37 引用 (Scopus)

    抄録

    Polycrystalline samples of the delafossite Rh oxide Cu1-x Agx Rh1-y Mgy O2 were investigated to clarify its transport properties. Mg substitution dramatically decreases the resistivity and the Hall coefficient, whereas it does not change the thermopower and the mobility. As an origin for this, we propose that the holes doped by the Mg ions are spatially segregated in the sample, and move away from the Mg ions to retain high mobility. In the parent oxide CuRh O2, the conductivity in the Cu layer is comparable with that in the Rh O2 layer at 300 K, which characterizes this material as a two-hole-band conductor.

    元の言語English
    記事番号235110
    ジャーナルPhysical Review B - Condensed Matter and Materials Physics
    74
    発行部数23
    DOI
    出版物ステータスPublished - 2006

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    Transport properties
    Oxides
    Hall effect
    Substitution reactions
    transport properties
    Ions
    substitutes
    electrical resistivity
    oxides
    Thermoelectric power
    coefficients
    ions
    conductors
    conductivity

    ASJC Scopus subject areas

    • Condensed Matter Physics

    これを引用

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    abstract = "Polycrystalline samples of the delafossite Rh oxide Cu1-x Agx Rh1-y Mgy O2 were investigated to clarify its transport properties. Mg substitution dramatically decreases the resistivity and the Hall coefficient, whereas it does not change the thermopower and the mobility. As an origin for this, we propose that the holes doped by the Mg ions are spatially segregated in the sample, and move away from the Mg ions to retain high mobility. In the parent oxide CuRh O2, the conductivity in the Cu layer is comparable with that in the Rh O2 layer at 300 K, which characterizes this material as a two-hole-band conductor.",
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    AB - Polycrystalline samples of the delafossite Rh oxide Cu1-x Agx Rh1-y Mgy O2 were investigated to clarify its transport properties. Mg substitution dramatically decreases the resistivity and the Hall coefficient, whereas it does not change the thermopower and the mobility. As an origin for this, we propose that the holes doped by the Mg ions are spatially segregated in the sample, and move away from the Mg ions to retain high mobility. In the parent oxide CuRh O2, the conductivity in the Cu layer is comparable with that in the Rh O2 layer at 300 K, which characterizes this material as a two-hole-band conductor.

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