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Raman Scattering and Superconductivity of Alkali-Fullerene Materials

Published online by Cambridge University Press:  25 February 2011

J. S. Lannin ,
M. G. Mitch ,
W. Bacsa  and
S. J. Chase
J. S. Lannin
Affiliation:
Dept. of Physics, Penn State University, University Park, PA 16802
M. G. Mitch
Affiliation:
Dept. of Physics, Penn State University, University Park, PA 16802
W. Bacsa
Affiliation:
Dept. of Physics, Penn State University, University Park, PA 16802
S. J. Chase
Affiliation:
Dept. of Physics, Penn State University, University Park, PA 16802
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Abstract

Raman scattering measurements in alkali—fullerene alloys in ultrathin and thin films provide evidence for variations in electron—phonon coupling. For x — 3similar behavior of Rb3 C60 films of different thickness support substantial electron—phonon induced damping of specific Hg(i) modes derived from intramolecular modes of C60. In 400A thick films a reduction of induced scattering from Raman inactive C60 modes substantiates the importance ofHg(2), but not Hg(3) modes for phonon—mediated superconductivity. In contrast to RbxC60 and KxC60 ultrathin film solid solutions, similar Raman spectra for NaxC60 indicate substantially reduced coupling consistent with the absence of superconductivity in this system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 270: Symposium M – Novel Forms of Carbon , 1992 , 179
Copyright
Copyright © Materials Research Society 1992

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References

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