Multilayered Josephson junction logic and memory devices
- Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
Flux quantum logic and memory circuits using superconducting Josephson tunnel junctions have high-speed switching times ({approximately} 1 ps), low power dissipation (< 1 {micro}W per circuit) and low levels of thermally induced electrical noise. Current designs of such circuits employ single trilayer junctions, which impose circuit size and logic threshold limitations. A new design component, the multilayered tunnel junction, consists of a vertically stacked array (a one dimensional superlattice) of Josephson tunnel junctions. The introduction of multilayered junctions into superconducting electronic circuitry offers a reduction in current device size, fault tolerances, and new device applications. The authors present numerical simulations of simple circuits employing multilayered Josephson junctions as design components. Comparison with conventional single flux quantum (SFQ) circuitry is discussed. They also present preliminary measurements of multilayered Josephson junctions fabricated for use in flux quantum devices.
- OSTI ID:
- 82854
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1452-2
- Country of Publication:
- United States
- Language:
- English
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