1. Multiband superconductivity in PrPt4Ge12 single crystals
- Author
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Zhang, J. L., Chen, Y., Jiao, L., Gumeniuk, R., Nicklas, M., Chen, Y. H., Yang, L., Fu, B. H., Schnelle, W., Rosner, H., Leithe-Jasper, A., Grin, Y., Steglich, F., and Yuan, H. Q.
- Subjects
Condensed Matter - Superconductivity - Abstract
We report measurements of the London penetration depth $\Delta\lambda(T)$ and the electronic specific heat $C_e(T)$ on high-quality single crystals of the filled-skutterudite superconductor PrPt$_4$Ge$_{12}$ ($T_c\simeq$8K). Both quantities show a weak temperature dependence at $T\ll T_c$, following $\Delta\lambda\sim T^n$ ($n\simeq 3.2$) and $C_e/T\sim T^{2.8}$. Such temperature dependences deviate from both conventional s-wave type and nodal superconductivity. A detailed analysis indicates that the superfluid density $\rho_s(T)$, 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 PrPt$_4$Ge$_{12}$., Comment: 5 pages, 4 figures
- Published
- 2012
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