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Coulomb blockade electrometer with a high-T c island

  • Condensed Matter
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Abstract

We report on a successful attempt to fabricate a Coulomb blockade electrometer consisting of an ultrasmall YBa2Cu3O7−δ (YBCO) island coupled to two gold electrodes through a high-resistance native surface tunnel barrier. A third electrode placed near the island was used as an electrostatic gate. Spectra typical for tunneling into the YBCO superconductor were reproducibly measured. At temperatures below 0.5 K the low-bias conductance was suppressed by the Coulomb blockade. The blockade could be periodically varied by the gate potential. An external magnetic field of up to 5 T strongly influenced the transport via the island but without any change in the period of the Coulomb oscillations.

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Authors and Affiliations

  1. P. L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, 117334, Moscow, Russia

    S. E. Kubatkin

  2. A. V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, 117333, Moscow, Russia

    A. Ya. Tzalenchuk

  3. Chalmers University of Technology and University of Göteborg, S-412 96, Göteborg, Sweden

    Z. G. Ivanov, P. Delsing, R. I. Shekhter & T. Claeson

Authors
  1. S. E. Kubatkin
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  2. A. Ya. Tzalenchuk
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  3. Z. G. Ivanov
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  4. P. Delsing
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  5. R. I. Shekhter
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  6. T. Claeson
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Additional information

Pis’ma Zh. Éksp. Teor. Fiz. 63, No. 2, 112–117 (25 January 1996)

Published in English in the original Russian journal. Edited by Steve Torstveit.

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Kubatkin, S.E., Tzalenchuk, A.Y., Ivanov, Z.G. et al. Coulomb blockade electrometer with a high-T c island. Jetp Lett. 63, 126–132 (1996). https://doi.org/10.1134/1.566990

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  • DOI: https://doi.org/10.1134/1.566990

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