Superconducting phase diagram of the filled skuterrudite PrOs4Sb12
M.-A. Measson, D. Braithwaite, J. Flouquet, G. Seyfarth, J.P. Brison,, E. Lhotel, C. Paulsen, H. Sugawara, H. Sato
TL;DR
This paper presents detailed measurements of the specific heat and superconducting phase diagram of PrOs4Sb12, revealing two distinct superconducting transitions and insights into its unconventional pairing mechanisms.
Contribution
It provides the first precise magnetic field-temperature phase diagram of PrOs4Sb12 and analyzes its multiband effects and paramagnetic limitations.
Findings
Two sharp anomalies at Tc1= 1.89K and Tc2= 1.72K
Hc2(T) shows paramagnetic limitation and multiband effects
Supports even parity pairing in PrOs4Sb12
Abstract
We present new measurements of the specific heat of the heavy fermion superconductor PrOs4Sb12, on a sample which exhibits two sharp distinct anomalies at Tc1= 1.89K and Tc2= 1.72K. They are used to draw a precise magnetic field-temperature superconducting phase diagram of PrOs4Sb12 down to 350 mK. We discuss the superconducting phase diagram of PrOs4Sb12 and its possible relation with an unconventional superconducting order parameter. We give a detailed analysis of Hc2(T), which shows paramagnetic limitation (a support for even parity pairing) and multiband effects.
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