Magnetic effects on THz superconducting tunnel junctions at different temperatures

Chengjiang Zhang; Qijun Yao; Shengcai Shi

doi:10.1117/12.900323

11 August 2011 Magnetic effects on THz superconducting tunnel junctions at different temperatures

Chengjiang Zhang, Qijun Yao, Shengcai Shi

Proceedings Volume 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications; 81950M (2011) https://doi.org/10.1117/12.900323
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

We have investigated the effect of a moderately strong magnetic field (generated by superconducting coil, up to 380Gauss, 6 quantum fluxes within a single junction; generated by one piece of permanent magnet; generated by two pieces of permanent magnets respectively) on Nb superconducting tunnel junctions at different temperatures. Both experimental and numerical results show that the superconducting tunnel junction DC Josephson current can be significantly reduced by a magnetic field. A relatively strong magnet field may suppress the gap voltage as well as the sharp nonlinearity at the gap. We also investigated the leakage current and DC Josephson current of the Nb SIS junction at different temperatures.

Citation Download Citation

Chengjiang Zhang, Qijun Yao, and Shengcai Shi "Magnetic effects on THz superconducting tunnel junctions at different temperatures", Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81950M (11 August 2011); https://doi.org/10.1117/12.900323

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