Superconducting thin films of the noncentrosymmetric superconductor Nb 0.18 Re 0.82 were successfully deposited by UHV sputtering technique. X-ray diffraction analysis indicated that the films are polycrystalline, with a preferential (nn0) orientation and the lattice parameter in agreement with the expected single α-Mn cubic phase. A detailed electrical characterization of the samples as a function of the thickness (3.5 nm d 142 nm) was performed both in the normal and in the superconducting

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... tes, revealing a well-established superconducting ordering, as well as an estimated value of the upper critical field, μ 0 H c2 , comparable with the Pauli limit. Finally, the symmetry of the order parameter was probed by tunneling spectroscopy on Al/Al 2 O 3 /Nb 0.18 Re 0.82 heterostructures, which provides evidence for a single s-wave superconducting gap.