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arXiv · 2205.15766

Higher harmonic resistance oscillations in micro-bridge superconducting Nb ring

Masashi Tokuda·Ryoya Nakamura·Masaki Maeda·Yasuhiro Niimi
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Abstract

We studied resistance oscillations in two types of superconducting mesoscopic Nb rings. In a simple superconducting ring device, a resistance oscillation with a period of the quantized magnetic flux h/2e was clearly observed. On the other hand, in a micro-bridge ring device where two-narrow parts are embedded in parallel and work as superconductor-normal metal-superconductor junctions, higher harmonic resistance oscillations were obtained when the measurement current was well-tuned. We argue that such higher harmonic resistance oscillations can be detected even in the micro-bridge Nb superconducting ring device where the device size is much larger than the coherence length of Nb.

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Masashi Tokuda, Ryoya Nakamura, Masaki Maeda, Yasuhiro Niimi. 2022-05-31. Higher harmonic resistance oscillations in micro-bridge superconducting Nb ring. https://doi.org/10.35848/1347-4065%2Fac6a37

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