Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
Electronic band structure of superconducting PrPt4Ge12
Wosnitza, J.; Bergk, B.; Ignatchik, O.; Polyakov, A.; Gumeniuk, R.; Leithe-Jasper, A.; Schnelle, W.; Nicklas, M.; Rosner, H.; Grin, Y.
Recently, the new skutterudite superconductor PrPt4Ge12 with the comparably high transition temperature of Tc = 7.9 K was discovered . First experiments gave evidence for strong coupling and hint at point-like nodes of the order parameter . The Sommerfeld coefficient is rather low and indicates that PrPt4Ge12 is not a heavy-fermion superconductor. Here, we present results of a de Haas-van Alphen (dHvA) study performed on a high-quality single crystal. Several dHvA frequencies could be resolved over a broad angular range. The small band-resolved effective masses (less than half the free-electron mass) confirm the non-heavy-fermion character of the electron system. To get insight into the nature of the mass renormalization, the experimental data are compared with state-of-the-art band-structure calculations
Strongly Correlated Electron Systems 2010 (SCES2010), 27.06.-02.07.2010, Santa Fe, USA