Anomalous electronic susceptibility in Bi2Sr2CuO6+d and comparison with other overdoped cuprates
G. Le Bras, Z. Konstantinovic, J-P. Carton, A. Forget, D. Colson, F. Jean, G. Collin, Y. Dumont, C. Ayache
Abstract
We report magnetic susceptibility performed on overdoped Bi2Sr2CuO6+d powders as a function of oxygen doping d and temperature T. The decrease of the spin susceptibility with increasing T is confirmed. At sufficient high temperature, the spin susceptibility Chis presents an unusual linear temperature dependence Chis ~ Chis0 -Chi1 T. Moreover, a linear correlation between Chi1 and Chis0 for increasing hole concentration is displayed. A temperature Tchi, independent of hole doping characterizes this scaling. Comparison with other cuprates of the literature(LSCO, Tl-2201 and Bi-2212), over the same overdoped range, shows similarities with above results. These non conventional metal features will be discussed in terms of a singular narrow-band structure.
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