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Science 28 June 1991:
Vol. 252. no. 5014, pp. 1829 - 1831
DOI: 10.1126/science.252.5014.1829
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Articles

Pressure Dependence of Superconductivity in Single-Phase K3C60

G. SPARN 1, J. D. THOMPSON 1, S. -M. HUANG 2, R. B. KANER 2, F. DIEDERICH 2, R. L. WHETTEN 2, G. GRÜNER 2, and K. HOLCZER 2

1 Los Alamos National Laboratory, Los Alamos, NM 87545
2 Department of Physics, Department of Chemistry and Biochemistry, and Solid State Science Center, University of California, Los Angeles, CA 90024-1569

The superconducting compound K3C60 (with transition temperature Tc = 19.3 kelvin at ambient pressure), formed as a single phase by reaction of alkali vapor with solids of the icosahedral C60 molecule (buckminsterfullerene), shows a very large decrease of Tc with increasing pressure. Susceptibility measurements on sintered pellets showing bulk superconductivity are reported up to 21 kilobars of pressure, where Tc is already less than 8 kelvin. The results are consistent with a piling up of the density of states at the Fermi level.

Submitted on May 31, 1991
Accepted on June 4, 1991


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Crystal Structure, Bonding, and Phase Transition of the Superconducting Na2CsC60 Fulleride.
K. Prassides, C. Christides, I. M. Thomas, J. Mizuki, K. Tanigaki, I. Hirosawa, and T. W. Ebbesen (1994)
Science 263, 950-954
   Abstract »    PDF »
Compressibility of M3C60 Fullerene Superconductors: Relation Between Tc and Lattice Parameter.
O. ZHOU, Q. ZHU, J. E. FISCHER, N. COUSTEL, G. B. M. VAUGHAN, P. A. HEINEY, J. P. MCCAULEY JR., and A. B. SMITH III (1992)
Science 255, 833-835
   Abstract »    PDF »
Tunneling Spectroscopy of M3C60 Superconductors: The Energy Gap, Strong Coupling, and Superconductivity.
Z. ZHANG, C.-C. CHEN, and C. M. LIEBER (1991)
Science 254, 1619-1621
   Abstract »    PDF »
Electronic Correlation Effects and Superconductivity in Doped Fullerenes.
S. CHAKRAVARTY, M. P. GELFAND, and S. KIVELSON (1991)
Science 254, 970-974
   Abstract »    PDF »
(RbxK1-x)3C60 Superconductors: Formation of a Continuous Series of Solid Solutions.
C.-C. CHEN, S. P. KELTY, and C. M. LIEBER (1991)
Science 253, 886-888
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)