Inversion of K$_3$C$_{60}$ Reflectance Data

Details Inversion of K$_3$C$_{60}$ Reflectance Data Inversion of K$_3$C$_{60}$ Reflectance Data

1998-02-02

arxiv.org/abs/cond-mat/9802021v1

Physics

Condensed Matter

4 pages, including 4 postscript figures (submitted to PRL)

Scientific paper

10.1016/S0375-9601(98)00373-9

We outline a procedure for obtaining the electron-phonon spectral density by inversion of optical conductivity data, a process very similar in spirit to the McMillan-Rowell inversion of tunelling data. We assume both electron-impurity (elastic) and electron-phonon (inelastic) scattering processes. This procedure has the advantage that it can be utilized in the normal state. Furthermore, a very good qualitative result can be obtained explicitly, without iteration. We illustrate this technique on recently acquired far-infrared data in K$_3$C$_{60}$. We show that the electron-phonon interaction is most likely responsible for superconductivity in these materials.

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