Switching and Hysteresis on the I-V Curves of Submicron BSCCO (2212) Bridges

In thin BSCCO (2212) whisker-based superconducting bridges with width and length < or = 1 mm we observe random telegraph noise at discrete values of current. We show that the noise is associated with spontaneous processes of addition and removal of discrete vortex trains and reflects the regular...

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Bibliographic Details
Published in:Journal of low temperature physics 2005-04, Vol.139 (1), p.281-288
Main Authors: Zybtsev, S.G., Pokrovskii, V.Ya, Gorlova, I.G., Latyshev, Yu.I., Luchinin, V.V., Savenko, A.Yu
Format: Article
Language:English
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Summary:In thin BSCCO (2212) whisker-based superconducting bridges with width and length < or = 1 mm we observe random telegraph noise at discrete values of current. We show that the noise is associated with spontaneous processes of addition and removal of discrete vortex trains and reflects the regular structure of steps on the I-V curves. The average lifetime of the trains tau falls down with increasing temperature T in a complex way: intervals of steep drop (~ an order of magnitude per Kelvin) are separated with a plateau of tau(T) with tau ~ 10-2 s. The 70 GHz irradiation with 100 mW power results in the growth of the average switching frequency by 5 orders of magnitude; thus the HTSC bridges could be efficient detectors of microwave radiation. We discuss the peculiar features of tau(T).
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-005-3931-2