Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs4Sb12
Lei Shu, D. E. MacLaughlin, W. P. Beyermann, R. H. Heffner, G. D. Morris, O. O. Bernal, F. D. Callaghan, J. E. Sonier, W. M. Yuhasz, N. A. Frederick, M. B. Maple
DOI 10.1103/PhysRevB.79.174511 · Physical Review B
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Abstract
Transverse-field muon spin rotation (TF-μSR) experiments in the heavy-fermion superconductor PrOs4Sb12(Tc=1.85 K) suggest that the superconducting penetration depth λ(T) is temperature independent at low temperatures, consistent with a gapped quasiparticle excitation spectrum. In contrast, radio frequency inductive measurements yield a stronger temperature dependence of λ(T), indicative of point nodes in the gap. Muon Knight-shift measurements in the normal state of PrOs4Sb12 suggest that the perturbing effect of the muon charge on the neighboring Pr3+ crystalline electric field is negligibly small and therefore is unlikely to cause the difference between the TF-μSR and rf results. The discrepancy appears to be related to multiband superconductivity in PrOs4Sb12.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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