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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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