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- W2092018084 abstract "High quality Sr14-xCaxCu24O41 single-crystals are successfully grown by floating-zone technique, and the transport properties are studied. The temperature dependence of resistivity along the c-axis direction is semiconductorlike for x ≤ 10 and it can be fitted by the thermal activation equation ρ = ρ0exp(Δ/kBT) with kB being the Boltzmann constant and Δ the activation energy. A break in the slope of thermopower (S) versus the inverse temperature (1/T) corresponding to the formation of charge-density waves (CDW) is first observed for x ≤ 6. The temperature dependence of thermopower becomes metallic for x ≥ 8 while the resistivity is still semiconductorlike. We propose that the insulation behaviour of the resistivity in the Ca doping range 8 ≤ x ≤ 11 could result from the localization of the charge carriers due to the disorder induced by Ca doping and a revised electronic phase diagram is derived based on our observations." @default.
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- W2092018084 date "2008-05-01" @default.
- W2092018084 modified "2023-09-23" @default.
- W2092018084 title "Metal—Insulator Transition in Ca-Doped Sr 14-x Ca x Cu 24 O 41 Systems Probed by Thermopower Measurements" @default.
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- W2092018084 doi "https://doi.org/10.1088/0256-307x/25/5/091" @default.
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