Multiband superconductivity in the heavy fermion compound PrOs4Sb12
Gabriel Seyfarth (CRTBT), Jean-Pascal Brison (CRTBT), Marie-Aude, M\'easson (DRFMC, SPSMS, Cea Grenoble), Jacques Flouquet (DRFMC, SPSMS, Cea, Grenoble), Koichi Izawa (DRFMC, SPSMS, Cea Grenoble, Issp), Yuji Matsuda, (ISSP), Hitoshi Sugawara, Hideyuki Sato
TL;DR
This study demonstrates multiband superconductivity in PrOs4Sb12 through thermal conductivity measurements revealing partial restoration of conductivity at low temperatures and specific magnetic fields.
Contribution
The paper provides experimental evidence of multiband superconductivity in PrOs4Sb12 using thermal conductivity measurements in the vortex state.
Findings
40% of normal state thermal conductivity restored at low temperatures and magnetic fields.
Behavior similar to MgB2 indicating multiband superconductivity.
Thermal conductivity measurements down to Tc/40.
Abstract
The thermal conductivity of the heavy fermion superconductor PrOs4Sb12 was measured down to Tc/40 throughout the vortex state. At lowest temperatures and for magnetic fields H ~ 0.07Hc2, already 40% of the normal state thermal conductivity is restored. This behaviour (similar to that observed in MgB2) is a clear signature of multiband superconductivity in this compound.
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