We report the transient optical pump-probe reflectivity measurements on single and double layer cuprate single crystals and thin films of ten different stoichiometries. We find that with sufficiently low fluence the relaxation time (tau(R)) of all samples exhibits a power law divergence with temperature (T): tau(R proportional to) T-3 +/-0.5. Further, the divergence has an onset temperature above the superconducting transition temperature for all superconducting samples. Possible causes of this divergence are discussed.
Pierluigi Bruzzone, Kamil Sedlák, Roberto Guarino, Evgeny Solodko
Henrik Moodysson Rønnow, Ivica Zivkovic, Richard Gaal, Youngro Lee
Pierluigi Bruzzone, Kamil Sedlák, Nikolay Bykovskiy, Ortensia Dicuonzo