Line node positions of the superconducting gap function of UPd2Al3
Peter Thalmeier, David Parker
DOI 10.1103/PhysRevB.79.134514 · Physical Review B
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Abstract
The field-angular oscillation of the magnetothermal conductivity is a powerful method for clarifying the gap symmetry of unconventional superconductors. It has been used successfully in Sr2RuO4, CeCoIn5, and the cuprates, and has been applied to the heavy-fermion superconductor UPd2Al3. Despite this last application, however, there is still a controversy regarding the gap symmetry of UPd2Al3, with separate proposals for Δ(k)=Δ0 cos kz and Δ(k)=Δ0 cos 2kz in the literature from analyzing the same thermal-conductivity data. In this paper we systematically study this important issue and show conclusively from all available experimental evidence that, consistent with theoretical grounds, Δ0 cos kz is the actual gap function of UPd2Al3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.8 | Pressure not reported | onset |
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