High-quality Nb/HfO[sub x]-Hf/Nb Josephson junction

Morohashi, Shin'ichi; Imamura, Takeshi
June 1992
Applied Physics Letters;6/15/1992, Vol. 60 Issue 24, p3039
Academic Journal
Reports the fabrication of a niobium Josephson junction with a hafnium (Hf) overlayer. Use of Hf native oxide formed by thermal oxidation as a tunneling barrier; Degradation of junction characteristics in deposition and annealing; Increase of subgap leakage current after annealing.


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