Print Email Facebook Twitter Gate-controlled quantum dots and superconductivity in planar germanium Title Gate-controlled quantum dots and superconductivity in planar germanium Author Hendrickx, N.W. Franke, D.P. Sammak, A. Kouwenhoven, M. Sabbagh, D. Yeoh, L. Li, R. Tagliaferri, M.L.V. Virgilio, M. Capellini, G. Scappucci, G. Veldhorst, M. Publication year 2018 Abstract Superconductors and semiconductors are crucial platforms in the field of quantum computing. They can be combined to hybrids, bringing together physical properties that enable the discovery of new emergent phenomena and provide novel strategies for quantum control. The involved semiconductor materials, however, suffer from disorder, hyperfine interactions or lack of planar technology. Here we realise an approach that overcomes these issues altogether and integrate gate-defined quantum dots and superconductivity into germanium heterostructures. In our system, heavy holes with mobilities exceeding 500,000 cm2 (Vs)−1 are confined in shallow quantum wells that are directly contacted by annealed aluminium leads. We observe proximity-induced superconductivity in the quantum well and demonstrate electric gate-control of the supercurrent. Germanium therefore has great promise for fast and coherent quantum hardware and, being compatible with standard manufacturing, could become a leading material for quantum information processing. Subject High Tech Systems & MaterialsIndustrial InnovationAluminumGermaniumQuantum dotElectrical conductivityPhysical propertyQuantum mechanicsSuperconductivityChemical structure To reference this document use: http://resolver.tudelft.nl/uuid:6359774c-c324-49ea-ab1c-3e768c9445c6 TNO identifier 842157 Publisher Nature Publishing Group ISSN 2041-1723 Source Nature Communications, 9 (1) Article number 2835 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.