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.
@article{arxiv.2206.13799,
title = {Energy distribution controlled ballistic Josephson junction},
author = {P. Pandey and D. Beckmann and R. Danneau},
journal= {arXiv preprint arXiv:2206.13799},
year = {2022}
}