Nonequilibrium superconductivity in Y1-xPrxBa2Cu3O7 thin films

Details Nonequilibrium superconductivity in Y1-xPrxBa2Cu3O7 thin films Nonequilibrium superconductivity in Y1-xPrxBa2Cu3O7 thin films

2002-04-03

arxiv.org/abs/cond-mat/0204066v1

Physics

Condensed Matter

Superconductivity

To appear in Physica B

Scientific paper

10.1016/S0921-4526(01)01166-8

We have measured the picosecond conductivity dynamics in Y1-xPrxBa2Cu3O7 thin films from 0.3-2.0 terahertz. Our experimental technique measures the complex conductivity $\sigma_{re}(\omega$) + i$\sigma_{im}(\omega$) permitting the simultaneous observation of superconducting pair and quasiparticle dynamics. We emphasize aspects of the conductivity dynamics which extend our previous results. In particular, the recovery of $\sigma_{re}$ is faster than $\sigma_{im}$, and the recovery of $\sigma_{im}$ decreases with increasing frequency. This suggests another carrier relaxation pathway, in addition to superconducting pair recovery, following optical excitation.

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