Non-local Andreev reflection through Andreev molecular states in graphene Josephson junctions

Zsurka, Eduárd and Plaszkó, Noel László and Rakyta, Péter and Kormányos, Andor (2023) Non-local Andreev reflection through Andreev molecular states in graphene Josephson junctions. 2D MATERIALS, 10. No-035009. ISSN 2053-1583

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Abstract

We propose that a device composed of two vertically stacked monolayer graphene Josephson junctions can be used for Cooper pair splitting. The hybridization of the Andreev bound states of the two Josephson junction can facilitate non-local transport in this normal-superconductor hybrid structure, which we study by calculating the non-local differential conductance. Assuming that one of the graphene layers is electron and the other is hole doped, we find that the non-local Andreev reflection can dominate the differential conductance of the system. Our setup does not require the precise control of junction length, doping, or super conducting phase difference, which could be an important advantage for experimental realization.

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