Andreev molecules in semiconductor nanowire double quantum dots

Andreev molecules in semiconductor nanowire double quantum dots

Su, Zhaoen (University of Pittsburgh)
Tacla, Alexandre B. (University of Strathclyde)
Hocevar, Moïra (Université Grenoble Alpes; CNRS)
Car, Diana (Eindhoven University of Technology)
Plissard, Sébastien R. (Université de Toulouse)
Bakkers, E.P.A.M. (TU Delft QN/Bakkers Lab; TU Delft QuTech Advanced Research Centre; Eindhoven University of Technology; Kavli institute of nanoscience Delft)
Daley, Andrew J. (University of Strathclyde)
Pekker, David (University of Pittsburgh)
Frolov, Sergey M. (University of Pittsburgh)

2017-12-01

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.

http://resolver.tudelft.nl/uuid:d6607c5d-207a-4e1c-bb99-c334d86241a8

https://doi.org/10.1038/s41467-017-00665-7

2041-1723

Nature Communications, 8 (1)

Institutional Repository

journal article

© 2017 Zhaoen Su, Alexandre B. Tacla, Moïra Hocevar, Diana Car, Sébastien R. Plissard, E.P.A.M. Bakkers, Andrew J. Daley, David Pekker, Sergey M. Frolov