Physics – Condensed Matter – Superconductivity
Scientific paper
2010-07-23
Nanotechnology 21, 445202 (2010)
Physics
Condensed Matter
Superconductivity
11 pages, 5 figures
Scientific paper
We characterize inductors fabricated from ultra-thin, approximately 100 nm wide strips of niobium (Nb) and niobium nitride (NbN). These nanowires have a large kinetic inductance in the superconducting state. The kinetic inductance scales linearly with the nanowire length, with a typical value of 1 nH/um for NbN and 44 pH/um for Nb at a temperature of 2.5 K. We measure the temperature and current dependence of the kinetic inductance and compare our results to theoretical predictions. We also simulate the self-resonant frequencies of these nanowires in a compact meander geometry. These nanowire inductive elements have applications in a variety of microwave frequency superconducting circuits.
Annunziata Anthony J.
Catelani Gianluigi
Frunzio Luigi
Frydman Aviad
Prober Daniel E.
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