Print Email Facebook Twitter Ballistic superconductivity and tunable pi-junctions in InSb quantum wells Title Ballistic superconductivity and tunable pi-junctions in InSb quantum wells Author Ke, C. (TU Delft QRD/Goswami Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Möhle, C.M. (TU Delft QRD/Goswami Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) de Vries, F.K. (TU Delft QRD/Goswami Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Thomas, Candis (Purdue University) Metti, S. (Birck Nanotechnology Center; Purdue University) Guinn, Charles R. (Purdue University) Lodari, M. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Scappucci, G. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Goswami, S. (TU Delft QRD/Goswami Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Date 2019 Abstract Planar Josephson junctions (JJs) made in semiconductor quantum wells with large spin-orbit coupling are capable of hosting topological superconductivity. Indium antimonide (InSb) two-dimensional electron gases (2DEGs) are particularly suited for this due to their large Landé g-factor and high carrier mobility, however superconducting hybrids in these 2DEGs remain unexplored. Here we create JJs in high quality InSb 2DEGs and provide evidence of ballistic superconductivity over micron-scale lengths. A Zeeman field produces distinct revivals of the supercurrent in the junction, associated with a 0−π transition. We show that these transitions can be controlled by device design, and tuned in-situ using gates. A comparison between experiments and the theory of ballistic π-Josephson junctions gives excellent quantitative agreement. Our results therefore establish InSb quantum wells as a promising new material platform to study the interplay between superconductivity, spin-orbit interaction and magnetism. To reference this document use: http://resolver.tudelft.nl/uuid:a3f82d55-2b28-4161-9480-6a11a739122e DOI https://doi.org/10.1038/s41467-019-11742-4 ISSN 2041-1723 Source Nature Communications, 10 (1) Part of collection Institutional Repository Document type journal article Rights © 2019 C. Ke, C.M. Möhle, F.K. de Vries, Candis Thomas, S. Metti, Charles R. Guinn, M. Lodari, G. Scappucci, S. Goswami, More Authors Files PDF s41467_019_11742_4.pdf 1.17 MB Close viewer /islandora/object/uuid:a3f82d55-2b28-4161-9480-6a11a739122e/datastream/OBJ/view