Nb nano-rings connected serially by Nb wires exhibit, at low bias currents, the typical parabolic Little-Parks magnetoresistance oscillations. As the bias current increases, these oscillations become sinusoidal. This result is ascribed to the generation of Josephson junctions caused by the combined effect of current-induced phase slips and the non-uniformity of the order parameter along each ring due to the Nb wires attached to it. This interpretation is validated by further increasing the bias current, which results in magnetoresistance oscillations typical of a SQUID.
|Journal of Physics: Conference Series
|Published - 19 Apr 2018
|28th International Conference on Low Temperature Physics, LT 2018 - Gothenburg, Sweden
Duration: 9 Aug 2017 → 16 Aug 2017
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