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Author Yildirim, T. ♦ Barbedette, L. ♦ Fischer, J. E. ♦ Bendele, G. M. ♦ Stephens, P. W. ♦ Lin, C. L. ♦ Goze, C. ♦ Rachdi, F. ♦ Robert, J. ♦ Petit, P. ♦ Palstra, T. T.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ FULLERENES ♦ SUPERCONDUCTIVITY ♦ CARBON COMPOUNDS ♦ BARIUM ADDITIONS ♦ CESIUM ADDITIONS ♦ POTASSIUM ADDITIONS ♦ RUBIDIUM ADDITIONS ♦ QUATERNARY COMPOUNDS ♦ SYNTHESIS ♦ ELECTRONIC STRUCTURE ♦ CRYSTAL STRUCTURE ♦ X-RAY SPECTRA ♦ NMR SPECTRA
Abstract A new class of fullerides, {ital M}Ba{sub 2}C{sub 60} ({ital M}=K, Rb, or Cs) and {ital M}BaCsC{sub 60}, allows us to study the effect of molecular valence on electronic structure while maintaining the crystal structure of {ital M}{sub 3}C{sub 60} superconductors. X-ray diffraction and Raman scattering show that these are face-centered cubic with pentavalent and quadrivalent C{sub 60}{close_quote}s, respectively. We find no evidence for superconductivity down to 0.5 K, while electron spin resonance indicates weakly metallic behavior. {sup 13}C NMR indicates strong dynamical disorder above room temperature, which may be related to the anisotropic crystal field induced by cations of different valence. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-11-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 17


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