System dependence of the magnetic-field penetration depth in C60 superconductors
作者： Y.J. Uemura , A. Keren , L.P. Le , G.M. Luke , W.D. Wu
DOI: 10.1016/0921-4534(94)92471-6
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摘要: We have performed muon spin relaxation (μSR) measurements of the magnetic field penetration depth λ in Rb3C60, K3C60, and Na2CsC60. In a plot Tc versus rate σ(T → 0) ∝ λ−2, we observe monotonic variation, following roughly linear relation σ. Assuming clean-limit situation, where λ−2 ns/m∗ (carrier density / effective mass), μSR results imply variation ns/m∗, opposite to expected simple band picture decreasing width (increasing m∗) with increasing lattice constant Tc) would reduced ns/m∗.
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