Multiband superconductivity in PrPt4Ge12 single crystals
J. L. Zhang, Y. Chen, L. Jiao, R. Gumeniuk, M. Nicklas, Y. H. Chen, L. Yang, B. H. Fu, W. Schnelle, H. Rosner, A. Leithe-Jasper, Y. Grin, F. Steglich, H. Q. Yuan
DOI 10.1103/PhysRevB.87.064502 · Physical Review B
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Abstract
We report measurements of the London penetration depth Δλ(T) and the electronic specific heat Ce(T) on high-quality single crystals of the filled skutterudite superconductor PrPt4Ge12 (Tc≃ 8 K). Both quantities show a weak temperature dependence at T≪Tc, following Δλ∼Tn (n=3.2±0.1) and Ce/T∼T2.8. Such temperature dependences deviate from both conventional s-wave-type and nodal superconductivity. A detailed analysis indicates that the superfluid density ρs(T), derived from the penetration depth, as well as the electronic specific heat can be consistently described in terms of a two-gap model, providing strong evidence of multiband superconductivity for PrPt4Ge12.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
| PrPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.8 | Pressure not reported | zero_resistance |
| PrPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.8 | Pressure not reported | onset |
| PrPt4Ge12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.1 | Pressure not reported | onset |
| 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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