Published September 9, 2005
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Journal Article
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Abrupt Transition in Quasiparticle Dynamics at Optimal Doping in a Cuprate Superconductor System
Chicago
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Abstract
We report time-resolved measurements of the photoinduced change in reflectivity, DeltaR, in the Bi2Sr2Ca1-yDyyCu2O8+delta (BSCCO) system of cuprate superconductors as a function of hole concentration. We find that the kinetics of quasiparticle decay and the sign of DeltaR both change abruptly where the superconducting transition temperature Tc is maximal. These coincident changes suggest that a sharp transition in quasiparticle dynamics takes place precisely at optimal doping in the BSCCO system.
Additional Information
©2005 The American Physical Society (Received 15 March 2005; published 9 September 2005; corrected 22 September 2005) This work was supported by DOE-DE-AC03-76SF00098.Files
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