Fabrication of rhenium Josephson junctions |
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Authors: | Xue Guang-Ming Yu Hai-Feng Tian Ye Liu Wei-Yang Yu Hong-Wei Ren Yu-Feng and Zhao Shi-Ping |
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Institution: | Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract: | Rhenium is a superconductor with a relatively weak tendency to oxidize, which is advantageous in superconducting quantum circuit and qubit applications. In this work, Re/Al-AlOx/Re Josephson tunnel junctions were fabricated using a selective film-etching process similar to that developed in Nb trilayer technology. The Re films had a superconducting transition temperature of 4.8 K and a transition width of 0.2 K. The junctions were found to be highly reproducible using the fabrication process and their characteristics had good quality with a low leakage current and showed a superconducting gap of 0.55 meV. |
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Keywords: | Re Josephson junctions trilayer process qubit application |
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