DC SQUID based on the mesoscopic multiterminal Josephson junction

Details DC SQUID based on the mesoscopic multiterminal Josephson junction DC SQUID based on the mesoscopic multiterminal Josephson junction

2001-09-21

arxiv.org/abs/cond-mat/0109384v1

Physica C 372-376 P1, 178 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 4 figures, presented at the EUCAS 2001 conference

Scientific paper

A theory is offered for a novel device, mesoscopic four-terminal SQUID. The studied system consists of a mesoscopic four-terminal junction, one pair of terminals of which is incorporated in a superconducting ring and the other one is connected with a transport circuit. The nonlocal weak coupling between the terminals leads to effects of phase dragging and magnetic flux transfer. The behaviour of a four-terminal SQUID, controlled by the external parameters, the applied magnetic flux and the transport current is investigated. The critical current and the current voltage characteristics as functions of magnetic flux are calculated. In the nonlocal mesoscopic case they depend not only on the magnitude of the applied flux but also on its sign, allowing measurement of the direction of the external magnetic field.

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