Andreev molecules in semiconductor nanowire double quantum dots

Zhaoen Su, Alexandre B. Tacla, Moïra Hocevar, Diana Car, Sébastien R. Plissard, Erik P. A. M. Bakkers, Andrew J. Daley, David Pekker and Sergey M. Frolov ()
Additional contact information
Zhaoen Su: University of Pittsburgh
Alexandre B. Tacla: University of Strathclyde
Moïra Hocevar: Universite Grenoble Alpes
Diana Car: Eindhoven University of Technology
Sébastien R. Plissard: Université de Toulouse
Erik P. A. M. Bakkers: Eindhoven University of Technology
Andrew J. Daley: University of Strathclyde
David Pekker: University of Pittsburgh
Sergey M. Frolov: University of Pittsburgh

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: 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.

Date: 2017
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DOI: 10.1038/s41467-017-00665-7

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