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arXiv · 1007.4187

Tunable superconducting nanoinductors

Anthony J Annunziata·Daniel F Santavicca·Luigi Frunzio·Gianluigi Catelani·Michael J Rooks·Aviad Frydman·Daniel E Prober
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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/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.

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Anthony J Annunziata, Daniel F Santavicca, Luigi Frunzio, Gianluigi Catelani, Michael J Rooks, Aviad Frydman, Daniel E Prober. 2010-09-27. Tunable superconducting nanoinductors. https://doi.org/10.1088/0957-4484%2F21%2F44%2F445202

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