Multiband superconductivity in the correlated electron filled skutterudite system Pr1-xCexPt4Ge12
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Dosyalar
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Physical Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
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.
Açıklama
Anahtar Kelimeler
[No Keywords Available]
Kaynak
Physical Review B
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
94
Sayı
14
Künye
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.
