Quasiparticle response of superconducting aluminum to electromagnetic radiation
Katrin Steinberg, Marc Scheffler, Martin Dressel
DOI 10.1103/PhysRevB.77.214517 · Physical Review B
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Abstract
The response of superconducting aluminum to electromagnetic radiation is investigated in broad frequency (45 MHz–40 GHz) and temperature ranges (T>Tc/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 quasiparticle response. Here we observe the full temperature and frequency dependences of the coherence peak. Varying the mean-free path gives insight into the dynamics, scattering, and coherence effects of the quasiparticles in the superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.7 | Pressure not reported | zero_resistance |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.75 | Pressure not reported | zero_resistance |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.9 | Pressure not reported | zero_resistance |
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