Regensburg 2022 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity: Poster Session
TT 30.21: Poster
Thursday, September 8, 2022, 15:00–18:00, P1
A Ballistic Graphene Cooper Pair Splitter — Preeti Pandey1, Romain Danneau2, and •Detlef Beckmann2 — 1Institute of Nan- otechnology, Karlsruhe Institute of Technology, D-76021 Karlsruhe, Germany — 2Institute for Quantum Materials and Technologies, Karl- sruhe Institute of Technology, D-76021 Karlsruhe, Germany
We report an experimental study of a Cooper pair splitter based on ballistic graphene multiterminal junctions. In a two transverse junction geometry, namely the superconductor-graphene-superconductor and the normal metal-graphene-normal metal, we observe clear signatures of Cooper pair splitting in the local as well as nonlocal electronic transport measurements. Our experimental data can be very well de- scribed by our beam splitter model. These results open up possibilities to design new entangled state detection experiments using ballistic Cooper pair splitters.
[1] Phys. Rev. Lett. 126, 147701 (2021)