Regensburg 2025 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 17: 2D Semiconductors and van der Waals Heterostructures III
HL 17.5: Vortrag
Dienstag, 18. März 2025, 10:30–10:45, H15
Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields — •Katarina Stanojević1,5, Philipp Schmidt1,2, Kenji Watanabe3, Takashi Taniguchi4, Bernd Beschoten1, Vincent Mourik5, and Christoph Stampfer1,2 — 1JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, Germany — 2Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich, Germany — 3Research Center for Electronic and Optical Materials, National Institute for Materials Science, Japan — 4International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Japan — 5JARA Institute for Quantum Information (PGI-11), Forschungszentrum Jülich, Germany
Graphene-based Josephson junctions represent a promising platform for hybrid quantum devices due to their unique electronic properties. The absence of Schottky barriers enables highly transparent interfaces, while graphene’s ability to host proximity-induced superconductivity make it an interesting candidate for realizing tunable weak links. A key step towards harnessing graphene Josephson junctions for topological quantum applications is understanding the influence of in-plane magnetic fields, which tune the Zeeman energy and might enable the formation of topologically protected states. Here, we report on a tunable bilayer graphene Josephson junction encapsulated in WSe2. We investigate the behavior of the supercurrent under applied in-plane magnetic fields, revealing a pronounced anisotropy in the magnetic field induced decay and revival of the supercurrent for varying in-plane field angles.
Keywords: Josephson junction; bilayer graphene; superconductivity