期刊
APPLIED PHYSICS LETTERS
卷 99, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3624471
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资金
- European Commision [248933]
- MIUR
- Italian SuperComputing Resource Allocation ISCRA [IscrB_NDJJBS2001]
High quality epitaxial NbN/MgO/NbN Josephson junctions have been realized with MgO barriers up to a thickness of d = 1 nm. The junction properties coherently scale with the size of barrier, and low critical current densities down to 3 A/cm(2) have been achieved for larger barriers. In this limit, junctions exhibit macroscopic quantum phenomena for temperatures lower than 90 mK. Measurements and junction parameters support the notion of a possible use of these devices for multiphoton quantum experiments, taking advantage of the fast non equilibrium electron-phonon relaxation times of NbN. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624471]
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