A study of charge transfer in superconducting single-electron transistors with asymmetric tunnel junctions

Ju Jin Kim, Jeong O. Lee, Jong Wan Park, Jinhee Kim, Kyu Tae Kim, Kyung Hwa Yoo, Hyuk Chan Kwon, Jong Chul Park

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Abstract

We have investigated charge transfer properties in superconducting single-electron tunneling transistors with asymmetric tunnel junctions. The measured gate modulation curves in the Josephson-quasiparticle region show highly asymmetric and multi-peak features quite different from those of the normal Coulomb oscillation. These complex features in the modulation curves turn out to be due to the combined effect of Cooper pair resonance tunneling and junction asymmetry. The overall characteristics of the gate modulation curves are explained qualitatively by the Josephson-quasiparticle cycle and the resonant Cooper pair tunneling. Also, we have observed an apparent 2 e-oscillation in the supercurrent region resulting from the even-odd parity effect on the superconducting island.

Original languageEnglish
Pages (from-to)514-517
Number of pages4
JournalJournal of the Korean Physical Society
Volume33
Issue number4
Publication statusPublished - 1998 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Kim, J. J., Lee, J. O., Park, J. W., Kim, J., Kim, K. T., Yoo, K. H., Kwon, H. C., & Park, J. C. (1998). A study of charge transfer in superconducting single-electron transistors with asymmetric tunnel junctions. Journal of the Korean Physical Society, 33(4), 514-517.