System dependence of the magnetic-field penetration depth in C60 superconductors

Y. J. Uemura, A. Keren, L. P. Le, G. M. Luke, W. D. Wu, J. S. Tsai, K. Tanigaki, K. Holczer, S. Donovan, R. L. Whetten

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We have performed muon spin relaxation (μSR) measurements of the magnetic field penetration depth λ in Rb3C60, K3C60, and Na2CsC60. In a plot of Tc versus the muon spin relaxation rate σ(T → 0) ∝ λ-2, we observe a monotonic variation, following a roughly linear relation Tc ∝ σ. Assuming a clean-limit situation, where λ-2 ∝ ns/m* (carrier density / effective mass), the μSR results imply a variation Tc ∝ ns/m*, opposite to the variation expected in a simple band picture where a decreasing band width (increasing m*) with increasing lattice constant (increasing Tc) would have reduced ns/m*.

Original languageEnglish (US)
Pages (from-to)2501-2502
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume235-240
Issue numberPART 4
DOIs
StatePublished - Dec 1994
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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