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

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 $1/\tau$ 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.

submitted at May 4

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Cited by in corpus (11)

• The two colors of MgB2
• Multiband and impurity effects in infrared and optical spectra of MgB2
• Anisotropic s-wave superconductivity: comparison with experiments on MgB2 single crystals
• Superconducting energy gap in MgB2 film observed by infrared reflectance
• Clean and Dirty Superconductivity in Pure, Al doped, and Neutron Irradiated MgB2: a Far-Infrared Study
• Two-band parallel conductivity at terahertz frequencies in the superconducting state of MgB${}_2$.
• Magneto-optical reflectivity of superconducting MgB2 single crystals
• A Magnetization and Microwave Study of Superconducting MgB2
• Contribution of Collective Excitations to Third Harmonic Generation in Multiband Superconductors: the case of MgB${}_2$
• Complicated nature of the gap in MgB2: magnetic field-dependent optical studies
• Heat capacity of mesoscopically disordered superconductors:implications to MgB${}_2$