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 language | English |
|---|---|
| Article number | 134501 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 70 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2004 Oct |
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- 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 journal › Article
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TY - JOUR
T1 - Charge dynamics of Ca2-xNaxCuO2Cl 2 as a correlated electron system with the ideal tetragonal lattice
AU - Waku, K.
AU - Katsufuji, Takuro
AU - Kohsaka, Y.
AU - Sasagawa, T.
AU - Takagi, H.
AU - Kishida, H.
AU - Okamoto, H.
AU - Azuma, M.
AU - Takano, M.
PY - 2004/10
Y1 - 2004/10
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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U2 - 10.1103/PhysRevB.70.134501
DO - 10.1103/PhysRevB.70.134501
M3 - Article
VL - 70
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 13
M1 - 134501
ER -