Energy distribution controlled ballistic Josephson junction

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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Cited by in corpus (4)

• Andreev and normal reflections in gapped bilayer graphene-superconductor junctions
• Magnetointerferometry of multiterminal Josephson junctions
• Nonequilibrium electron distribution function in a voltage-biased nanowire: A nonequilibrium Green's function approach
• Multiterminal Josephson junctions with tunable topological properties