材料科学
纳米光刻
氦
辐照
数码产品
低温学
离子
凝聚态物理
纳米技术
光电子学
原子物理学
核物理学
制作
物理化学
物理
化学
医学
替代医学
病理
量子力学
作者
Jay C. LeFebvre,Adhilsha Parachikunnumal,Shane A. Cybart
摘要
Superconductive electronics from Josephson junctions are governed by quantum mechanical tunneling through sub-10 nm scale insulating tunnel barriers. The electrical properties are exponentially sensitive to this dimension, which necessitates fabrication with nanoscale precision and uniformity. For circuits in high-transition temperature YBa2Cu3O7−δ (YBCO) thin films, direct writing of the material with a focused helium ion beam has shown promise in the creation of uniform nanoscale insulators for YBCO Josephson junctions and other circuit regions. In this paper, we report on the procedures and variables associated with this process and discuss the potential for scaling up the number of junctions for quantum sensing and complex energy efficient digital circuits.
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