Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs$_{4}$Sb$_{12}$

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

paper

Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs $_{4}$ Sb $_{12}$

arXiv:0806.2386 · doi:10.1103/PhysRevB.79.174511

Abstract

Transverse-field muon spin rotation ( $μ$ SR) experiments in the heavy-fermion superconductor PrOs $_{4}$ Sb $_{12}$ ( $T_{c} = 1.85$ K) suggest that the superconducting penetration depth $λ (T)$ is temperature-independent at low temperatures, consistent with a gapped quasiparticle excitation spectrum. In contrast, radiofrequency (rf) inductive measurements yield a stronger temperature dependence of $λ (T)$ , indicative of point nodes in the gap. This discrepancy appears to be related to the multiband structure of PrOs $_{4}$ Sb $_{12}$ . Muon Knight shift measurements in PrOs $_{4}$ Sb $_{12}$ suggest that the perturbing effect of the muon charge on the neighboring Pr $^{3 +}$ crystalline electric field is negligibly small, and therefore is unlikely to cause the difference between the $μ$ SR and rf results.

10 pages, 7 figures

Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs $_{4}$ Sb $_{12}$

Abstract

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Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs4​Sb12​

Abstract

References in corpus (9)

Cited by in corpus (14)

Penetration depth, multiband superconductivity, and absence of muon-induced perturbation in superconducting PrOs $_{4}$ Sb $_{12}$