Journal
NANOTECHNOLOGY
Volume 21, Issue 44, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/21/44/445202
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Funding
- NSF [ECS-0622035, DMR-0907082]
- Yale University
- CNR-Istituto di Cibernetica, Pozzuoli, Italy
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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 mu m(-1) for NbN and 44 pH mu m(-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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