Anomalous Electronic Susceptibility in Bi2sr2cuo6+d
  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 chis with increasing T is confirmed. At sufficient high temperature, chis presents an unusual linear temperature dependence chis=chis0 -chi1T . Moreover, a linear correlation between chi1 and chis0 for increasing hole concentration has been displayed. These non conventional metal features will be discussed in terms of a singular narrow-band structures. 
G. Le Bras-Jasmin, Z. Konstantinovic, J.P. Carton, D. Colson, A.   Forget, F. Jean, G. Collin, Y. Dumont and C. Ayache