Photoemission Spectra of C60-; Electron-phonon coupling, Jahn-Teller Effect and Superconductivity in the Fullerides

O. Gunnarsson (a), H. Handschuh (b), P.S. Bechthold (b), B. Kessler (b), G. Ganteför (b), and W. Eberhardt (b)
(a) Max-Planck-Institut für Festkörperforschung, Stuttgart
(b) Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, Jülich, Germany

A high-resolution experimental photoemission spectrum of C60- is compared with calculations including the Jahn-Teller effect and multiple phonon satellites. The spectra show discrete loss features due to the excitation of phonons. From the intensity of these features, electron-phonon coupling constants are derived, which support the electron-phonon mechanism for superconductivity. The systematic deviations from previously calculated coupling constants are discussed in detail.

Phys. Rev. Lett. 74, 1875 (1991).

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