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

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 superco...

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Bibliographic Details
Published in:arXiv.org 2016-08
Main Authors: Pfau, Heike, Nicklas, Michael, Stockert, Ulrike, Gumeniuk, Roman, Schnelle, Walter, Leithe-Jasper, Andreas, Grin, Yuri, Steglich, Frank
Format: Article
Language:English
Subjects:
Order parameters
Superconductivity
Temperature dependence
Transition temperature
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1608.06895