Current Amplification with Vertical Josephson Interferometers

Details Current Amplification with Vertical Josephson Interferometers Current Amplification with Vertical Josephson Interferometers

2011-05-30

arxiv.org/abs/1105.5971v1

Journal of Applied Physics vol.110, p.073910 (2011)

Physics

Condensed Matter

Superconductivity

18 pages, 6 figures

Scientific paper

10.1063/1.3646392

It has long been recognized that a control current $I_a$ injected into the section of a two-junction superconducting quantum interference device (SQUID) is able to produce a change of its critical current $I_c$, so that a current gain $g=|dI_c/dI_a|$ can be identified. We investigate the circumstances under which large gains can be achieved by using vertical Josephson interferometers which are characterized by small loop inductances. We discuss the theory of operation of such a novel device, its performances and its advantages with respect to planar interferometers used in the previous works. Two potential applications are addressed.

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