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

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

2001-05-09

arxiv.org/abs/cond-mat/0105180v1

Physics

Condensed Matter

Superconductivity

submitted at May 4

Scientific paper

10.1103/PhysRevB.65.052413

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 $1/\tau$ and superconducting gap $2\Delta$. By fitting the experimental transmission spectra at 40 K and below, we obtained $1/\tau =$ (700 $\sim$ 1000) cm$^{-1}$ and $2\Delta (0)\cong$ 42 cm$^{-1}$. These two quantities suggested that MgB$_{2}$ belong to the dirty limit.

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