NONEQUILIBRIUM SUPERCONDUCTIVITY AND QUASI-PARTICLE DYNAMICS STUDIED BY PHOTOINDUCED ACTIVATION OF MM-WAVE ABSORPTION

Authors
FEENSTRA BJ SCHUTZMANN J VANDERMAREL D PINAYA RP DECROUX M
Citation
Bj. Feenstra et al., NONEQUILIBRIUM SUPERCONDUCTIVITY AND QUASI-PARTICLE DYNAMICS STUDIED BY PHOTOINDUCED ACTIVATION OF MM-WAVE ABSORPTION, Physical review letters, 79(24), 1997, pp. 4890-4893
Citations number
24
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
24
Year of publication
1997
Pages
4890 - 4893
Database
ISI
SICI code
0031-9007(1997)79:24<4890:NSAQDS>2.0.ZU;2-Q
Abstract
We present a study of nonequilibrium superconductivity in DyBa2Cu3O7-d elta using photoinduced activation crf mm-wave absorption. 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 si gnal we observe a second, faster, decay with a sign opposite to the bo lometric signal for T > 40 K. We attribute this to the unusual propert ies of quasiparticles residing near the nodes of an unconventional sup erconductor, resulting in a strong enhancement of the recombination ti me.