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arXiv · 2206.13799

Energy distribution controlled ballistic Josephson junction

P. Pandey·D. Beckmann·R. Danneau
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Abstract

We report an experimental study on the tuning of supercurrent in a ballistic graphene-based Josephson junction by applying a control voltage to a transverse normal channel. In this four-terminal geometry, the control voltage changes the occupation of Andreev states in the Josephson junction, thereby tuning the magnitude of the supercurrent. As a function of gate voltage, we find two different regimes characterized by a double-step distribution and a hot-electron distribution, respectively. Our work opens new opportunities to design highly controllable Josephson junctions for tunable superconducting quantum circuits.

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P. Pandey, D. Beckmann, R. Danneau. 2022-06-28. Energy distribution controlled ballistic Josephson junction. https://doi.org/10.1103/physrevb.106.214503

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