Hysteresis and intermittency in a nano-bridge based suspended DC-SQUID

Details Hysteresis and intermittency in a nano-bridge based suspended DC-SQUID Hysteresis and intermittency in a nano-bridge based suspended DC-SQUID

2010-10-21

arxiv.org/abs/1010.4391v1

Physics

Condensed Matter

Superconductivity

Scientific paper

We study voltage response of nano-bridge based DC-SQUID fabricated on a Si\_{3}N\_{4} membrane. Such a configuration may help in reducing 1/f noise, which originates from substrate fluctuating defects. We find that the poor thermal coupling between the DC-SQUID and the substrate leads to strong hysteretic response of the SQUID, even though it is biased by an alternating current. In addition, when the DC-SQUID is biased near a threshold of spontaneous oscillations, the measured voltage has an intermittent pattern, which depends on the applied magnetic flux through the SQUID.

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