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arXiv:1007.4187 · Nanotechnology

Tunable superconducting nanoinductors

Anthony J. Annunziata, Daniel F. Santavicca, Luigi Frunzio, Gianluigi Catelani, Michael J. Rooks, A. Frydman, D. E. Prober

Published Oct 5, 2010• 262 citations
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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.

DOI
10.1088/0957-4484/21/44/445202

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