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Far-infrared transmission studies of c-axis oriented superconducting MgB2 thin film

J. H. Jung·K. W. Kim·H. J. Lee·M. W. Kim·T. W. Noh·W. N. Kang·Hyeong-Jin Kim·Eun-Mi Choi·C. U. Jung·Sung-Ik Lee
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Abstract

We reported far-infrared transmission measurements on a c-axis oriented superconducting MgB$_{2}$ thin film in the frequency range of 30 $\sim$ 250 cm$^{-1}$. We found that these measurements were sensitive to values of scattering rate $1/τ$ and superconducting gap $2Δ$. By fitting the experimental transmission spectra at 40 K and below, we obtained $1/τ=$ (700 $\sim$ 1000) cm$^{-1}$ and $2Δ(0)\cong$ 42 cm$^{-1}$. These two quantities suggested that MgB$_{2}$ belong to the dirty limit.

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J. H. Jung, K. W. Kim, H. J. Lee, M. W. Kim, T. W. Noh, W. N. Kang, Hyeong-Jin Kim, Eun-Mi Choi, C. U. Jung, Sung-Ik Lee. 2001-05-09. Far-infrared transmission studies of c-axis oriented superconducting MgB2 thin film. https://doi.org/10.1103/physrevb.65.052413

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