Abstract
The McMillan–Rowell inversion of tunneling data has long served as one of the best methods for obtaining information about the microscopic interactions in a superconductor with strong electron–phonon interactions. In this contribution we outline a method designed to yield similar information, based on the optical conductivity. The precise inversion in this case is a more difficult problem than in tunneling. Fortunately, however, an approximate formula can be derived, which gives the inelastic scattering function, α2F(Ω), explicitly from the data. We apply this method to K3C60, and demonstrate that the electron–phonon interaction is sufficiently strong to support the superconductivity in this compound.
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Marsiglio1, F. Inversion of Optical Conductivity Data in Metals. Journal of Superconductivity 12, 163–167 (1999). https://doi.org/10.1023/A:1007766829839
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DOI: https://doi.org/10.1023/A:1007766829839