Probing the Superconducting Gap Symmetry of PrOs4Sb12: A Penetration Depth Study
Elbert E. M. Chia, M. B. Salamon, H. Sugawara, H. Sato
DOI 10.1103/PhysRevLett.91.247003 · Physical Review Letters
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Abstract
We report measurements of the magnetic penetration depth λ in single crystals of PrOs4Sb12 down to 0.1 K, with the ac field applied along the a, b, and c directions. In all three field orientations, λ∼T2 and superfluid density ρs∼T2 for T<0.3Tc. Data are best fit by the He3 A-phase-like gap with multidomains, each having two point nodes along a cube axis, and parameter Δ0(0)/kBTc=2.6, suggesting that PrOs4Sb12 is a strong-coupling superconductor with two point nodes on the Fermi surface. We also confirm the double transitions at 1.75 and 1.85 K seen in other measurements.
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 | onset |
| PrOs4Sb12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.75 | Pressure not reported | onset |
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