Superconducting gap structure of the skutterudite LaPt4Ge12 probed by specific heat and thermal transport

H. Pfau, M. Nicklas, U. Stockert, R. Gumeniuk, W. Schnelle, A. Leithe-Jasper, Y. Grin, F. Steglich

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Abstract

We investigated the superconducting order parameter of the filled skutterudite LaPt4Ge12, with a transition temperature of Tc=8.3 K. To this end, we performed temperature and magnetic-field dependent specific-heat and thermal-conductivity measurements. All data are compatible with a single superconducting s-wave gap. However, a multiband scenario cannot be ruled out. The results are discussed in the context of previous studies on the substitution series Pr1-xLaxPt4Ge12. They suggest compatible order parameters for the two end compounds LaPt4Ge12 and PrPt4Ge12. This is not consistent with a single s-wave gap in LaPt4Ge12 considering previous reports of unconventional and/or multiband superconductivity in PrPt4Ge12.

Original languageEnglish (US)
Article number054523
JournalPhysical Review B
Volume94
Issue number5
DOIs
StatePublished - Aug 29 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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