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Superconductor-correlated metal-superconductor Josephson junctions: an optimized class for high speed digital electronics

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3 Author(s)
J. K. Freericks ; Dept. of Phys., Georgetown Univ., Washington, DC, USA ; B. K. Nikolic ; P. Miller

It has long been conjectured that tuning the barrier of a Josephson junction to lie close to the metal-insulator transition will enhance the switching speed and provide optimal performance. We examine a new class of junctions, so-called SCmS junctions, where the barrier is a correlated metal (or insulator) close to the metal-insulator transition. We show that high IcRN products and moderate temperature derivatives of Ic can be achieved when the thickness and metallicity of the barrier is properly tuned. We believe these junctions show promise for the fastest speed digital electronics operation.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:13 ,  Issue: 2 )