Far-infrared transmission studies on a superconducting BaPb1−xBixO3 thin film: Effects of a carrier scattering rate
C. U. Jung, J. H. Kong, B. H. Park, T. W. Noh, E. J. Choi
DOI 10.1103/PhysRevB.59.8869 · Physical Review B
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Abstract
We measured transmission spectra of a BaPb1−xBixO3(x∼0.25) thin film in the frequency region between 5 and 130cm−1. At low temperature, there is a BCS-like peak in the transmission spectrum near 21cm−1, corresponding to 2Δ(0)/kBTc=3.2±0.3, and a suppression at lower frequencies. The transmission measurement in superconducting state covering the frequency region up to 13Δ was found to be useful in probing the scattering rate of carriers. The value of scattering rate, 1/τ, was estimated to be about 280cm−1. This suggests that BaPb1−xBixO3 belongs to the moderately dirty regime (1/τ∼14×2Δ) rather than the extremely dirty regime of the Mattis-Bardeen theory.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaPb0.75Bi0.25O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | onset |
| BaPb1-xBixO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
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