Print Email Facebook Twitter Mechanisms of Andreev reflection in quantum Hall graphene Title Mechanisms of Andreev reflection in quantum Hall graphene Author Rigotti Manesco, A.L. (TU Delft QN/Akhmerov Group; Kavli institute of nanoscience Delft) Flór, Ian Matthias (Kavli institute of nanoscience Delft; Student TU Delft) Liu, C. (TU Delft QRD/Wimmer Group; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Akhmerov, A.R. (TU Delft QN/Akhmerov Group; Kavli institute of nanoscience Delft) Date 2022 Abstract We simulate a hybrid superconductor-graphene device in the quantum Hall regime to identify the origin of downstream resistance oscillations in a recent experiment [Zhao et al. Nature Physics 16, (2020)]. In addition to the previously studied Mach-Zehnder interference between the valley-polarized edge states, we consider disorder-induced scattering, and the appearance of the counter-propagating states generated by the interface density mismatch. Comparing our results with the experiment, we conclude that the observed oscillations are induced by the interfacial disorder, and that lattice-matched superconductors are necessary to observe the alternative ballistic effects. To reference this document use: http://resolver.tudelft.nl/uuid:2954bd13-2224-47f3-841a-fa55d9397bb0 DOI https://doi.org/10.21468/SCIPOSTPHYSCORE.5.3.045 ISSN 2666-9366 Source SciPost Physics Core, 5 (3) Part of collection Institutional Repository Document type journal article Rights © 2022 A.L. Rigotti Manesco, Ian Matthias Flór, C. Liu, A.R. Akhmerov Files PDF SciPostPhysCore_5_3_045.pdf 11.2 MB Close viewer /islandora/object/uuid:2954bd13-2224-47f3-841a-fa55d9397bb0/datastream/OBJ/view