Magnetic field dependence of the current-voltage curve of a superconducting single electron transistor in a high impedance environment

Pashkin, Yu. A. and Chen, C. D. and Haviland, D. B. and Kuzmin, L. S. (1996) Magnetic field dependence of the current-voltage curve of a superconducting single electron transistor in a high impedance environment. Czechoslovak Journal of Physics, 46 (4). pp. 2291-2292. ISSN 1572-9486

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Abstract

A superconducting single electron transistor has been investigated in a regime where its behavior is governed by the interplay of charging and Josephson effects with the corresponding energies Ec and EJ, respectively. Using a SQUID geometry, we were able to change the ratio of EJ/Ec (from EJ/Ec≈3.5 to EJ/Ec≈0.44). In zero magnetic field, we observed a sharp Coulomb blockade at low current followed by a negative slope of the I–V curve at higher current. Applying an external magnetic field perpendicular to the substrate and thus decreasing EJ/Ec we observed an increase of the blockade voltage from 10 μV up to 45 μV and a decrease of the crossover current from 5 nA down to 0.5 nA. Such a behavior of the transistor can be explained using a Bloch band picture.

Item Type:
Journal Article
Journal or Publication Title:
Czechoslovak Journal of Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
130680
Deposited By:
Deposited On:
22 Jan 2019 11:20
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:46