SKM 2023 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 14: 2D Materials III (joint session HL/CPP)
HL 14.2: Vortrag
Dienstag, 28. März 2023, 09:45–10:00, POT 81
Theory of non-local Andreev reflection through Andreev molecular states in graphene Josephson junctions — •Andor Kormányos1, Eduárd Zsurka1, Noel Plaszkó1, and Péter Rakyta1,2 — 1Department of Physics of Complex Systems, Eotvos Lorand University, Budapest, Hungary — 2Wigner Research Center for Physics, 29-33 Konkoly-Thege Miklos Str., H-1121 Budapest, Hungary
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 superconducting phase difference, which could be an important advantage for experimental realization.