Abstract
In this work, we consider controlling of logical states of Josephson memory cells (cryotrons) based on superconductor-insulator-superconductor (SIS) Josephson tunnel junctions by external current impulses. A mathematical model for the transitional processes that take place during direct logical transitions “0” → “1” and inverse logical transitions “1” → “0” is proposed. By means of mathematical modeling, we investigate transitional processes in cryotrons during the change of their logical state and obtain their transitional characteristics for operational temperatures T 1=11.6 K and T 2=81.2 K, close to the boiling temperatures of helium and nitrogen, respectively. It is shown that such memory cells can efficiently operate under the temperature T 2=81.2 K. The behavior of the Josephson cryotrons as well as their operational stability is explored.
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Partyka, A., Tyhanskyj, M. Mathematical Model for Transitional Processes in Josephson Cryotrons Based on Tunnel Junctions. J Supercond Nov Magn 24, 1513–1519 (2011). https://doi.org/10.1007/s10948-010-0925-3
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DOI: https://doi.org/10.1007/s10948-010-0925-3