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Proceedings Paper

Magnetic effects on THz superconducting tunnel junctions at different temperatures
Author(s): Chengjiang Zhang; Qijun Yao; Shengcai Shi
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Paper 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.

Paper Details

Date Published: 12 August 2011
PDF: 6 pages
Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81950M (12 August 2011); doi: 10.1117/12.900323
Show Author Affiliations
Chengjiang Zhang, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Graduate School of CAS (China)
Qijun Yao, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Shengcai Shi, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)


Published in SPIE Proceedings Vol. 8195:
International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications
X.-C. Zhang; Jianquan Yao; Cunlin Zhang; Zhenzhan Wang, Editor(s)

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