Charge dynamics of Ca2-xNaxCuO2Cl 2 as a correlated electron system with the ideal tetragonal lattice

K. Waku, Takuro Katsufuji, Y. Kohsaka, T. Sasagawa, H. Takagi, H. Kishida, H. Okamoto, M. Azuma, M. Takano

    Research output: Contribution to journalArticle

    28 Citations (Scopus)

    Abstract

    We report the reflectivity and the resistivity measurement of Ca 2-xNaxCuO2Cl2 (CNCOC), which has a single-CuO2-plane lattice with no orthorhombic distortion. The doping dependence of the in-plane optical conductivity spectra for CNCOC is qualitatively the same to those of other cuprates, but a slight difference between CNCOC and LSCO, i.e., the absence of the 1.5 eV peak in CNCOC, can be attributed to the smaller charge-stripe instability in CNCOC. The temperature dependence of the optical conductivity spectra of CNCOC has been analyzed both by the two-component model (Drude+Lorentzian) and by the one-component model (extended-Drude analysis). The latter analysis gives a universal trend of the scattering rate Γ(ω) with doping. It was also found that Γ(ω) shows a saturation behavior at high frequencies, whose origin is the same as that of resistivity saturation at high temperatures.

    Original languageEnglish
    Article number134501
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume70
    Issue number13
    DOIs
    Publication statusPublished - 2004 Oct

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    Optical conductivity
    Doping (additives)
    saturation
    conductivity
    electrical resistivity
    Electrons
    cuprates
    electrons
    Scattering
    reflectance
    trends
    Temperature
    temperature dependence
    scattering

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Charge dynamics of Ca2-xNaxCuO2Cl 2 as a correlated electron system with the ideal tetragonal lattice. / Waku, K.; Katsufuji, Takuro; Kohsaka, Y.; Sasagawa, T.; Takagi, H.; Kishida, H.; Okamoto, H.; Azuma, M.; Takano, M.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 13, 134501, 10.2004.

    Research output: Contribution to journalArticle

    Waku, K. ; Katsufuji, Takuro ; Kohsaka, Y. ; Sasagawa, T. ; Takagi, H. ; Kishida, H. ; Okamoto, H. ; Azuma, M. ; Takano, M. / Charge dynamics of Ca2-xNaxCuO2Cl 2 as a correlated electron system with the ideal tetragonal lattice. In: Physical Review B - Condensed Matter and Materials Physics. 2004 ; Vol. 70, No. 13.
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    AU - Katsufuji, Takuro

    AU - Kohsaka, Y.

    AU - Sasagawa, T.

    AU - Takagi, H.

    AU - Kishida, H.

    AU - Okamoto, H.

    AU - Azuma, M.

    AU - Takano, M.

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    N2 - We report the reflectivity and the resistivity measurement of Ca 2-xNaxCuO2Cl2 (CNCOC), which has a single-CuO2-plane lattice with no orthorhombic distortion. The doping dependence of the in-plane optical conductivity spectra for CNCOC is qualitatively the same to those of other cuprates, but a slight difference between CNCOC and LSCO, i.e., the absence of the 1.5 eV peak in CNCOC, can be attributed to the smaller charge-stripe instability in CNCOC. The temperature dependence of the optical conductivity spectra of CNCOC has been analyzed both by the two-component model (Drude+Lorentzian) and by the one-component model (extended-Drude analysis). The latter analysis gives a universal trend of the scattering rate Γ(ω) with doping. It was also found that Γ(ω) shows a saturation behavior at high frequencies, whose origin is the same as that of resistivity saturation at high temperatures.

    AB - We report the reflectivity and the resistivity measurement of Ca 2-xNaxCuO2Cl2 (CNCOC), which has a single-CuO2-plane lattice with no orthorhombic distortion. The doping dependence of the in-plane optical conductivity spectra for CNCOC is qualitatively the same to those of other cuprates, but a slight difference between CNCOC and LSCO, i.e., the absence of the 1.5 eV peak in CNCOC, can be attributed to the smaller charge-stripe instability in CNCOC. The temperature dependence of the optical conductivity spectra of CNCOC has been analyzed both by the two-component model (Drude+Lorentzian) and by the one-component model (extended-Drude analysis). The latter analysis gives a universal trend of the scattering rate Γ(ω) with doping. It was also found that Γ(ω) shows a saturation behavior at high frequencies, whose origin is the same as that of resistivity saturation at high temperatures.

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