Single electron tunnelling oscillations in a current-biased Josephson junction

Kuzmin, Leonid S. and Pashkin, Yuri A. (1994) Single electron tunnelling oscillations in a current-biased Josephson junction. Physica B: Condensed Matter, 194-19. pp. 1713-1714. ISSN 0921-4526

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Abstract

Searching for single electron tunnelling (SET) oscillations has been done in single ultrasmall Josephson junctions of area S≈0.01 μm2 at low temperatures, T≈50 mK. The current-biased regime of the junctions was achieved by insertion of high-Ohmic metallic resistors with R≈500 kΩ into dc leads and additional tunnel junctions of the same area into the voltage leads. Existence of the SET oscillations was proved by observation of the peaks in the dV/dI curves under irradiation of the junctions by an external RF signal when the critical current was suppressed by a magnetic field. The dc current position of the peaks was proportional to the frequency of the RF signal, following a relation I=±ef in correspondence to predictions of the Orthodox theory. Without magnetic field, clear peaks occurred at I=±2ef, following the Bloch relation.

Item Type:
Journal Article
Journal or Publication Title:
Physica B: Condensed Matter
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
130679
Deposited By:
Deposited On:
22 Jan 2019 11:20
Refereed?:
Yes
Published?:
Published
Last Modified:
03 Jun 2020 05:43