Tunable superconducting nanoinductors |
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Authors: | Annunziata Anthony J Santavicca Daniel F Frunzio Luigi Catelani Gianluigi Rooks Michael J Frydman Aviad Prober Daniel E |
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Affiliation: | Department of Applied Physics, Yale University, New Haven, CT 06511, USA. anthony.annunziata@yale.edu |
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Abstract: | 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 μm(-1) for NbN and 44 pH μm(-1) 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. |
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