Electronic structure, conductivity and superconductivity of doped C{sub 60}
- AT&T Bell Labs, Murray Hill, NJ (United States)
The curvature and topology required for fullerene formation strongly enhances the electronegativity of the carbon clusters and as a result C{sub 60} readily accepts electrons. Solid C{sub 60} undergoes chemical doping with a variety of metals to produce intercalation compounds which are conductors. In the case of the alkali metals the predominant phases present are: C{sub 60}, A{sub 3}C{sub 60} and A{sub 6}C{sub 60}. The A{sub 3}C{sub 60} compounds are formed from C{sub 60} by occupancy of the interstitial sites of the fee lattice. These phases constitute the first three-dimensional organic conductors and for A=K, Rb, the A{sub 3}C{sub 60} compounds are superconductors with transition temperatures of T{sub c} = 19 and 28K, respectively. Solid C{sub 60} also undergoes electrical doping when utilised as the active material in field effect transistors. Fullerene-based transistors show excellent n-type device characteristics.
- OSTI ID:
- 370694
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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