Design of Josephson Junctions for X-Ray Detection with Small Quasiparticle Loss at the Edges
Using Nb/Al technology, we are developing Josephson junctions for high-resolution X-ray spectroscopy. Quasiparticle loss due to trapping in the anodized edges of the present junctions degrades the X-ray energy resolution. We present the design and fabrication process of a new junction geometry that aims to minimize this kind of quasiparticle loss. The I-V characteristics of the new junctions indicate good junction quality.
KeywordsTunnel Junction Base Electrode Superconducting Tunnel Junction Barrier Area Junction Edge
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