Superconducting properties of noncentrosymmetric Nb0.18Re0.82 thin films probed by transport and tunneling experiments
Journal article, 2016

Superconducting thin films of the noncentrosymmetric superconductor Nb0.18Re0.82 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 alpha-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 states, revealing a well-established superconducting ordering, as well as an estimated value of the upper critical field, mu H-0(c2),comparable with the Pauli limit. Finally, the symmetry of the order parameter was probed by tunneling spectroscopy on Al/Al2O3/Nb0.18Re0.82 heterostructures, which provides evidence for a single s-wave superconducting gap.

Author

C. Cirillo

G. Carapella

M. Salvato

Riccardo Arpaia

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

M. Caputo

C. Attanasio

Physical Review B: covering condensed matter and materials physics

2469-9969 (eISSN)

Vol. 94 10

Subject Categories

Condensed Matter Physics

DOI

10.1103/PhysRevB.94.104512

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Created

10/7/2017