Failure of the empirical OCT law in the Bi2Sr2CuO6+d compound

Details Failure of the empirical OCT law in the Bi2Sr2CuO6+d compound Failure of the empirical OCT law in the Bi2Sr2CuO6+d compound

2002-11-07

arxiv.org/abs/cond-mat/0211135v1

Physics

Condensed Matter

Superconductivity

7 pages, 5 figures

Scientific paper

10.1209/epl/i2003-00354-1

We have studied the evolution of the thermoelectric power S(T) with oxygen doping of single-layered Bi2Sr2CuO6+d thin films and ceramics in the overall superconducting (Tc, S290K) phase diagram. While the universal relation between the room-temperature thermopower S290K and the critical temperature is found to hold in the strongly overdoped region (d>0.14), a strong violation is observed in the underdoped part of the phase diagram. The observed behaviour is compared with other cuprates and the different scenarios are discussed.

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