Thermal conductivity and gap structure of the superconducting phases of UPt{sub 3}
- CEA, Grenoble (France)
- CNRS, Grenoble (France)
We present new measurements of the thermal conductivity ({kappa}) of Upt{sub 3} down to very low temperatures (16 mK) and under magnetic fields (up to 4 T) which cover all the superconducting phases of Upt{sub 3}. The measurements in zero field are compared with recent theoretical predictions for the thermal conductivity, which is dominated by impurity states at the lowest temperatures studied. The measurements under magnetic field at low temperatures are surprising since they don`t show the expected low field square root dependence, {kappa} {proportional_to} {radical}B. The discontinuity of d{kappa}/dT at T{sub c} changes drastically when passing from the high field low temperature C phase to the low field high temperature A phase: this is related to the change of the symmetry of the superconducting order parameter when crossing the A {yields} C phase transition.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 569748
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 1-2 Vol. 108; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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