Author： Mun M-O.
Publisher： Springer Publishing Company
ISSN： 0896-1107
Source： Journal of Superconductivity: Incorporating Novel Magnetism, Vol.15, Iss.5, 2002-10, pp. : 475-477
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Abstract
The reflectivity of superconducting MgB2 (Tc = 39 K) has been measured on a randomly oriented thin film at room temperature over a wide-range of frequencies, 20 ≤ < 100000="">-1. The conductivity shows highly metallic behavior but cannot be explained with a simple Drude model alone. The electronic contribution is analyzed by a generalized Drude model. The scattering rate 1/() and the mass renormalization ratio m*()/m = 1 + () exhibit clear frequency dependence. The electron–phonon coupling strength is estimated to be ∼ 1.5 ± 0.5 while the plasma frequency p is 2.4 eV.
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