Print Email Facebook Twitter Coherent flux tunneling through NbN nanowires Title Coherent flux tunneling through NbN nanowires Author Peltonen, J.T. Astafiev, O.V. Korneeva, Y.P. Voronov, B.M. Korneev, A.A. Charaev, I.M. Semenov, A.V. Golt'sman, G.N. Ioffe, L.B. Klapwijk, T.M. Tsai, J.S. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2013-12-17 Abstract We demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The flux superposition achieved in the fully metallic NbN rings proves the universality of the phenomenon previously reported for InO x . We perform microwave spectroscopy and study the tunneling amplitude as a function of the wire width, compare the experimental results with theories, and estimate the parameters for existing theoretical models. To reference this document use: http://resolver.tudelft.nl/uuid:f82077d9-01a4-45aa-9a64-6d5326b8d484 DOI https://doi.org/10.1103/PhysRevB.88.220506 Publisher American Physical Society ISSN 1098-0121 Source http://link.aps.org/doi/10.1103/PhysRevB.88.220506 Source Physical Review B, 88 (22), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Physical Society Files PDF Klapwijk_2013.pdf 1.51 MB Close viewer /islandora/object/uuid:f82077d9-01a4-45aa-9a64-6d5326b8d484/datastream/OBJ/view