Evidence for Multiband Superconductivity in the Heavy Fermion Compound UNi2Al3
M. Jourdan, A. Zakharov, M. Foerster, H. Adrian
DOI 10.1103/PhysRevLett.93.097001 · Physical Review Letters
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Abstract
Epitaxial thin films of the heavy fermion superconductor UNi2Al3 with Tcmax=0.98 K were investigated. The transition temperature Tc depends on the current direction which can be related to superconducting gaps opening at different temperatures. Also the influence of the magnetic ordering at TN≃5 K on R(T) is strongly anisotropic, indicating different coupling between the magnetic moments and itinerant charge carriers on the multisheeted Fermi surface. The upper critical field Hc2(T) suggests an unconventional spin-singlet superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UNi2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.98 | Pressure not reported | onset |
| UPd2Al3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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