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Multiband superconductivity in the correlated electron filled skutterudite system Pr1-xCexPt4Ge12

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info:eu-repo/semantics/openAccess

Date

2016

Author

Zhang, S.
Singh, Yogesh P.
Adhikari, Rupendra Bahadur
Zhang, S.
Huang, Kevin
Yazıcı, Duygu
Jeon, Inho
Maple, M. Brian
Dzero, Maxim
Almasan, Carmen C.

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Citation

Singh, Y. P., Adhikari, R. B., Zhang, S., Huang, K., Yazici, D., Jeon, I., ... & Almasan, C. C. (2016). Multiband superconductivity in the correlated electron filled skutterudite system Pr 1− x Ce x Pt 4 Ge 12. Physical Review B, 94(14), 144502, doi: 10.1103/PhysRevB.94.144502.

Abstract

Studies of superconductivity in multiband correlated electronic systems have become one of the central topics in condensed-matter and materials physics. In this paper, we present the results of thermodynamic measurements on the superconducting filled skutterudite system Pr1-xCexPt4Ge12 (0 <= x <= 0.2) to investigate how substitution of Ce at Pr sites affects superconductivity. We find that an increase in Ce concentration leads to a suppression of the superconducting transition temperature from T-c similar to 7.9 K for x = 0 to T-c similar to 0.6 K for x = 0.14. Our analysis of the specific-heat data for x <= 0.07 reveals that superconductivity must develop in at least two bands: the superconducting order parameter has nodes on one Fermi pocket and remains fully gapped on the other. Both the nodal and nodeless gaps decrease, with the nodal gap being suppressed more strongly upon Ce substitution. Ultimately, the higher-Ce-concentration samples (x > 0.07) display a nodeless gap only.

Source

Physical Review B

Volume

94

Issue

14

URI

https://hdl.handle.net/11494/2077

Collections

  • Enerji Sistemleri Mühendisliği Bölümü Koleksiyonu - Makaleler [10]
  • Scopus İndeksli Yayınlar Koleksiyonu [525]
  • WoS İndeksli Yayınlar Koleksiyonu [685]



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