Muon Spin Relaxation and Isotropic Pairing in Superconducting PrOs4Sb12
D. E. MacLaughlin, J. E. Sonier, R. H. Heffner, O. O. Bernal, Ben-Li Young, M. S. Rose, G. D. Morris, E. D. Bauer, T. D. Do, M. B. Maple
DOI 10.1103/PhysRevLett.89.157001 · Physical Review Letters
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Abstract
Transverse-field muon-spin rotation measurements in the vortex-lattice of the heavy-fermion (HF) superconductor PrOs4Sb12 yield a temperature dependence of the magnetic penetration depth λ indicative of an isotropic or nearly isotropic energy gap. This is not seen to date in any other HF superconductor and is a signature of isotropic pairing symmetry, possibly related to a novel nonmagnetic “quadrupolar Kondo” HF mechanism in PrOs4Sb12. The T=0 relaxation rate σs(0)=0.91(1) μs−1 yields an estimated magnetic penetration depth λ(0)=3440(20) Å, which is considerably shorter than in other HF superconductors.
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 |
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