(RbxK1-x)3C60 superconductors: Formation of a continuous series of solid solutions

Chia Chun Chen, Stephen P. Kelty, Charles M. Lieber*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)


By means of an approach that employs alkali-metal alloys, bulk single-phase (RbxK1-x)3C60 superconductors have been prepared for all x between 0 and 1. For x = 1 it is shown that the maximum superconducting fraction, which approaches 100% in sintered pellets, occurs at a Rb to C60 ratio of 3:1. More importantly, single-phase superconductors are formed at all intermediate values of x, and it is shown that the transition temperature (Tc) increases linearly with x in this series of materials. The formation of a continuous range of solid solutions demonstrates that the rubidium- and potassium-doped C60 superconducting phases must be isostructural, and furthermore, suggests that the linear increase in Tc with x results from a chemical pressure effect.

Original languageEnglish
Pages (from-to)886-888
Number of pages3
Issue number5022
Publication statusPublished - 1991 Aug 23
Externally publishedYes

ASJC Scopus subject areas

  • General


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