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

Far-infrared transmission studies on a superconducting BaPb_1-xBi_xO₃ thin film: Effects of a carrier scattering rate

C. U. Jung, J. H. Kong, B. H. Park, T. W. Noh, E. J. Choi

Department of Physics

Seoul National University

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We measured transmission spectra of a BaPb_1-xBi_xO₃(x0.25) 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)/k_BT_c = 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 BaPb_1-xBi_xO₃ belongs to the moderately dirty regime (1/τ14×2Δ) rather than the extremely dirty regime of the Mattis-Bardeen theory.

Original language	English
Pages (from-to)	8869-8874
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	59
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.59.8869
State	Published - 1999

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title = "Far-infrared transmission studies on a superconducting BaPb1-xBixO3 thin film: Effects of a carrier scattering rate",

abstract = "We measured transmission spectra of a BaPb1-xBixO3(x0.25) 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/τ14×2Δ) rather than the extremely dirty regime of the Mattis-Bardeen theory.",

author = "Jung, {C. U.} and Kong, {J. H.} and Park, {B. H.} and Noh, {T. W.} and Choi, {E. J.}",

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T1 - Far-infrared transmission studies on a superconducting BaPb1-xBixO3 thin film

T2 - Effects of a carrier scattering rate

AU - Jung, C. U.

AU - Kong, J. H.

AU - Park, B. H.

AU - Noh, T. W.

AU - Choi, E. J.

PY - 1999

Y1 - 1999

N2 - We measured transmission spectra of a BaPb1-xBixO3(x0.25) 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/τ14×2Δ) rather than the extremely dirty regime of the Mattis-Bardeen theory.

AB - We measured transmission spectra of a BaPb1-xBixO3(x0.25) 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/τ14×2Δ) rather than the extremely dirty regime of the Mattis-Bardeen theory.

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Far-infrared transmission studies on a superconducting BaPb_1-xBi_xO₃ thin film: Effects of a carrier scattering rate

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