Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system

N. Gedik, J. Orenstein, S. Ono +2

We report time-resolved measurements of the photoinduced change in reflectivity, Delta R, in the Bi2Sr2Ca(1-y)Dy(y)Cu2O(8+delta) (BSCCO) system of cuprate superconductors as a func…