%0 Journal Article
%T Non-equilibrium Superconductivity and Quasiparticle Dynamics studied by Photo Induced Activation of Mm-Wave Absorption (PIAMA)
%A B. J. Feenstra
%A J. Schuetzmann
%A D. van der Marel R. P¨Śrez Pinaya
%A M. Decroux
%J Physics
%D 1997
%I arXiv
%R 10.1103/PhysRevLett.79.4890
%X We present a study of non-equilibrium superconductivity in DyBa2Cu3O7-d using photo induced activation of mm-wave absorption (PIAMA). We monitor the time evolution of the thin film transmissivity at 5 cm-1 subject to pulsed infrared radiation. In addition to a positive bolometric signal we observe a second, faster, decay with a sign opposite to the bolometric signal for T>40 K. We attribute this to the unusual properties of quasi-particles residing near the nodes of an unconventional superconductor, resulting in a strong enhancement of the recombination time.
%U http://arxiv.org/abs/cond-mat/9709005v1