Signatures of Andreev Blockade in a Double Quantum Dot Coupled to a Superconductor.

  title={Signatures of Andreev Blockade in a Double Quantum Dot Coupled to a Superconductor.},
  author={Po Zhang and Hao Wu and Jun Chen and Sabbir Ahmed Khan and Peter Krogstrup and David Pekker and Sergey M. Frolov},
  journal={Physical review letters},
  volume={128 4},
We investigate an electron transport blockade regime in which a spin triplet localized in the path of current is forbidden from entering a spin-singlet superconductor. To stabilize the triplet, a double quantum dot is created electrostatically near a superconducting Al lead in an InAs nanowire. The quantum dot closest to the normal lead exhibits Coulomb diamonds, and the dot closest to the superconducting lead exhibits Andreev bound states and an induced gap. The experimental observations… 

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