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This article is cited in 10 scientific papers (total in 10 papers)
CONDENSED MATTER
Determination of the current-phase relation in Josephson junctions by means of an asymmetric two-junction SQUID
L. V. Ginzburgab, I. E. Batovab, V. V. Bol'ginovbc, S. V. Egorovb, V. I. Chichkovd, A. E. Shchegolevefc, N. V. Klenoveafcg, I. I. Solovievacg, S. V. Bakurskiyac, M. Yu. Kupriyanovac a Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow region, Russia
b Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
c Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
d National University of Science and Technology MISiS, Moscow, Russia
e Faculty of Physics, Lomonosov Moscow State University
f Moscow Technical University of Communications and Informatics, Moscow, Russia
g Moscow Technological University (MIREA), Moscow, Russia
Abstract:
An analytical approach that makes it possible to reconstruct the current-phase relation (CPR) in Josephson structures included in one of the arms of a two-junction superconducting quantum interference device (SQUID), where the second junction has a significantly higher critical current and a known (sinusoidal) CPR, has been developed. The developed methods of analytical and numerical studies of current-flow transformations in two-junction SQUIDs make it possible to reconstruct the CPR of a junction with a low critical current taking into account both the existence of the self-inductance of the interferometer contour and a possible asymmetry in the supply current system. The efficiency of this approach has been confirmed by the experimental study of niobium-aluminum/aluminum oxide-niobium test structures with the known CPR.
Received: 07.11.2017 Revised: 21.11.2017
Citation:
L. V. Ginzburg, I. E. Batov, V. V. Bol'ginov, S. V. Egorov, V. I. Chichkov, A. E. Shchegolev, N. V. Klenov, I. I. Soloviev, S. V. Bakurskiy, M. Yu. Kupriyanov, “Determination of the current-phase relation in Josephson junctions by means of an asymmetric two-junction SQUID”, Pis'ma v Zh. Èksper. Teoret. Fiz., 107:1 (2018), 54–61; JETP Letters, 107:1 (2018), 48–54
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https://www.mathnet.ru/eng/jetpl5466 https://www.mathnet.ru/eng/jetpl/v107/i1/p54
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