Quasi-Particle Dynamics in Superconducting Aluminum

Details Quasi-Particle Dynamics in Superconducting Aluminum Quasi-Particle Dynamics in Superconducting Aluminum

2007-12-20

arxiv.org/abs/0712.3391v2

Phys. Rev. B 77, 214517 (2008)

Physics

Condensed Matter

Superconductivity

7 pages, 10 figures

Scientific paper

10.1103/PhysRevB.77.214517

The response of superconducting aluminum to electromagnetic radiation is investigated in a broad frequency (45 MHz to 40 GHz) and temperature range ($T>T_c/2$), by measuring the complex conductivity. While the imaginary part probes the superfluid density (Cooper-pairs), the real part monitors the opening of the superconducting energy gap and -- most important here -- the zero-frequency quasi-particle response. Varying the mean free path gives some insight into the dynamics, scattering and coherence effects of the quasi-particles in the superconducting state.

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