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Resonant Raman Scattering of the Normal and Superconducting State of A3C60 Films (A = Rb,K)

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Electronic Properties of Fullerenes

Part of the book series: Springer Series in Solid-State Sciences ((SSSOL,volume 117))

Abstract

Significant spectral changes upon crossing superconducting Tc have been observed by resonant Raman scattering (RRS) (excited at 1.16 eV) in Rb3C60 and K3C60 thin films. In RRS spectra Hg (l) and Hg (2) modes clearly show Fano-lineshapes due fo resonance with electronic continuum. The electronic Raman scattering is clearly observed as a broad background (fwhm =450 cm−1) at low energy. The large linewidth observed in Hg (2) (fwhm = 60 cm−1) indicates a sizable electron-phonon coupling. Below Tc only Hg (2) mode changes dramatically its asymmetric lineshape becoming more symmetric in the superconducting phase. The fitting of experimentally observed Hg(2) lineshapes shows the abrupt change of the Fano parameters at Tc. Interband t lu tlu * transitions are suggested as a possible origin for low energy electronic excitations.

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Author information

Authors and Affiliations

  1. Istituto di Spettroscopia Molecolare, CNR, Via de’Castagnoli 1, I-40126, Bologna, Italy

    C. Taliani, G. Stanghellini, G. Ruani & R. Zamboni

  2. Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, 142092, Moscow, Russia

    V. N. Denisov

  3. Department of Thermophysics, Uzbek Academy of Sciences, Katartal 28, 700135, Tashkent, Uzbekistan

    A. A. Zakhidov

Authors
  1. C. Taliani
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  2. V. N. Denisov
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  3. A. A. Zakhidov
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  4. G. Stanghellini
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  5. G. Ruani
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  6. R. Zamboni
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Editor information

Editors and Affiliations

  1. Institut für Festkörperphysik, Universität Wien, Strudlhofgasse 4, A-1090, Wien, Austria

    Hans Kuzmany

  2. Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Postfach 3640, D-76021, Karlsruhe, Germany

    Jörg Fink

  3. Physikalisches Institut II, Universität Stuttgart, Pfaffenwaldring 57, D-70550, Stuttgart, Germany

    Michael Mehring

  4. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569, Stuttgart, Germany

    Siegmar Roth

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© 1993 Springer-Verlag Berlin Heidelberg

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Taliani, C., Denisov, V.N., Zakhidov, A.A., Stanghellini, G., Ruani, G., Zamboni, R. (1993). Resonant Raman Scattering of the Normal and Superconducting State of A3C60 Films (A = Rb,K). In: Kuzmany, H., Fink, J., Mehring, M., Roth, S. (eds) Electronic Properties of Fullerenes. Springer Series in Solid-State Sciences, vol 117. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85049-3_43

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  • DOI: https://doi.org/10.1007/978-3-642-85049-3_43

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-85051-6

  • Online ISBN: 978-3-642-85049-3

  • eBook Packages: Springer Book Archive

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