Volume 67, Number 2, July 2004
|Page(s)||273 - 279|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 July 2004|
Electric instability in superconductor-normal conductor ring
Theoretische Physik III, Ruhr-Universität Bochum - D-44801 Bochum, Germany
Corresponding author: email@example.com
Accepted: 11 May 2004
Non-linear electrodynamics of a ring-shaped Andreev interferometer (superconductor/normal conductor/superconductor hybrid structure) coupled to a circuit of the dissipative current is investigated. The current-voltage characteristics (CVC) is demonstrated to be a series of loops with several branches intersecting at the CVC origin. The sensitivity of the transport current (or the applied voltage V) to a change of the external magnetic flux can be the same as the sensitivity of conventional SQUIDs. Spontaneous arising of coupled non-linear oscillations of the transport current, the Josephson current and the magnetic flux in Andreev interferometers are also predicted and investigated. The frequency of these oscillations can be varied in a wide range, while the maximal frequency can reach .
PACS: 74.45.+c – Proximity effects; Andreev effect; SN and SNS junctions / 85.25.Dq – Superconducting quantum interference devices (SQUIDs)
© EDP Sciences, 2004
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