Destruction of superconductivity in the narrow-band metal K3 C60s

Susan K. Watson; Kimberly Allen; D. W. Denlinger; F. Hellman

doi:10.1103/PhysRevB.55.3866

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Destruction of superconductivity in the narrow-band metal K3 C60s

Susan K. Watson, Kimberly Allen, D. W. Denlinger, F. Hellman

DOI 10.1103/PhysRevB.55.3866 · Physical Review B

T1

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Abstract

Transport data on K3 C60 prepared with different amounts of disorder are presented, indicating that as the disorder is increased the material undergoes a superconductor-insulator transition, a result which does not occur in conventional wide-band metals. We speculate that this behavior is a consequence of the narrow conduction band and low electron density in K3 C60 , which gives rise to an extreme sensitivity to disorder and correlation effects.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	onset