Physical Review B: Condensed Matter and Materials Physics
Doi
Abstract
We report measurements of ac susceptibility and hence the in-plane London penetration depth on the same samples of Bi2.15Sr1.85CaCu2O8+δ and Bi2.1Sr1.9Ca0.85Y0.15Cu2O8+δ for many values of the hole concentration (p). These support the scenario in which the pseudogap weakens the superconducting response only for p≲0.19.We acknowledge funding from the EPSRC (U.K.), for the experimental facilities in Cambridge, and further financial support from The Royal Society, EURYI, and MEXT-CT-2006-039047. W.A. was supported by the Development and Promotion of Science and Technology Talents Project (D.P.S.T.), Thailand
