Penetration depth and Ginzburg number in Rb3C60

A. I. Sokolov*, Yu A. Kufaev, E. B. Sonin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The penetration depth λ, the Ginzburg-Landau parameter κ and the Ginzburg number Gi in the superconducting fulleride Rb3C60 are estimated. To determine these quantities the results of recent magnetization measurements performed by Politis et al. on the fine powder specimen are analyzed. A finiteness of superconducting grain sizes is taken into account and shown to influence considerably the calculated values of λ and κ. The experimental data are found to be consistent with the assumption that λ(T) obeys the Ginzburg-Landau theory within the whole temperature range studied and result in λ(0)=2100 Å, κ ≈90. The estimated critical region in Rb3C60 turns out to be narrow enough, Gi ≈10-4, indicating that superconducting fluctuations in fullerides are weaker than in high-Tc oxide superconductors.

Original languageEnglish
Pages (from-to)19-22
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume212
Issue number1-2
DOIs
StatePublished - 1 Jul 1993
Externally publishedYes

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