Penetration depth study in the heavy-fermion superconductor PrOs4Sb12
The penetration depth lambda in the filled-skutterudite heavy-fermion superconductor PrOs4Sb12 has been measured using transverse-field muon spin rotation (TF-muSR). It is found to be temperature-independent at low temperatures, consistent with a nonzero gap for quasiparticle excitations. In contras...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2006-03, Vol.374-375, p.247-250 |
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| container_title | Physica. B, Condensed matter |
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| creator | Shu, L. MacLaughlin, D.E. Heffner, R.H. Callaghan, F.D. Sonier, J.E. Morris, G.D. Bernal, O.O. Bosse, A. Anderson, J.E. Yuhasz, W.M. Frederick, N.A. Maple, M.B. |
| description | The penetration depth lambda in the filled-skutterudite heavy-fermion superconductor PrOs4Sb12 has been measured using transverse-field muon spin rotation (TF-muSR). It is found to be temperature-independent at low temperatures, consistent with a nonzero gap for quasiparticle excitations. In contrast, radiofrequency (RF) measurements yield a stronger temperature dependence of lambda(T), indicative of point nodes in the gap. A 10% discrepancy is found at low temperatures. This may be due to mechanisms that modify the vortex-state field distribution, or to the surface scattering which breaks pairs in an odd-parity superconductor. Alternatively, it may be a matter of field orientation of nodal gap structure in the muSR measurements. |
| doi_str_mv | 10.1016/j.physb.2005.11.066 |
| format | Article |
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| title | Penetration depth study in the heavy-fermion superconductor PrOs4Sb12 |
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