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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2002, Volume 75, Issue 7, Pages 397–401
(Mi jetpl3072)
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This article is cited in 12 scientific papers (total in 12 papers)
CONDENSED MATTER
Subgap anomaly and above-energy-gap structure in chains of diffusive SNS junctions
T. I. Baturinaa, D. R. Islamovab, Z. D. Kvona a Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk
b Novosibirsk State University
Abstract:
We present the results of low-temperature transport measurements on chains of superconductor-normalconstriction-superconductor (SNS) junctions fabricated on the basis of superconducting PtSi film. A comparative study of the properties of the chains, consisting of 3 and 20 SNS junctions in series, and single SNS junctions reveals essential distinctions in the behavior of the current-voltage characteristics of the systems: (i) the gradual decrease of the effective suppression voltage for the excess conductivity observed at zero bias as the quantity of the SNS junctions increases, (ii) a rich fine structure on the dependences $dV/dI-V$ at dc bias voltages higher than the superconducting gap and corresponding to some multiples of $2\Delta/e$. A model to explain this above-energy-gap structure based on energy relaxation of electron via Cooper-pair-breaking in superconducting island connecting normal metal electrodes is proposed.
Received: 26.02.2002
Citation:
T. I. Baturina, D. R. Islamov, Z. D. Kvon, “Subgap anomaly and above-energy-gap structure in chains of diffusive SNS junctions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 75:7 (2002), 397–401; JETP Letters, 75:7 (2002), 326–330
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https://www.mathnet.ru/eng/jetpl3072 https://www.mathnet.ru/eng/jetpl/v75/i7/p397
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Abstract page: | 120 | Full-text PDF : | 47 | References: | 28 |
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