Andreev molecules in semiconductor nanowire double quantum dots
Zhaoen Su (University of Pittsburgh)
Alexandre B. Tacla (University of Strathclyde)
Moïra Hocevar (Université Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS))
Diana Car (Eindhoven University of Technology)
Sébastien R. Plissard (Université de Toulouse)
Erik P.A.M. Bakkers (Kavli institute of nanoscience Delft, TU Delft - QN/Bakkers Lab, TU Delft - QuTech Advanced Research Centre, Eindhoven University of Technology)
Andrew J. Daley (University of Strathclyde)
David Pekker (University of Pittsburgh)
Sergey M. Frolov (University of Pittsburgh)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
Chains of quantum dots coupled to superconductors are promising for the realization of the Kitaev model of a topological superconductor. While individual superconducting quantum dots have been explored, control of longer chains requires understanding of interdot coupling. Here, double quantum dots are defined by gate voltages in indium antimonide nanowires. High transparency superconducting niobium titanium nitride contacts are made to each of the dots in order to induce superconductivity, as well as probe electron transport. Andreev bound states induced on each of dots hybridize to define Andreev molecular states. The evolution of these states is studied as a function of charge parity on the dots, and in magnetic field. The experiments are found in agreement with a numerical model.