Resonant and Inelastic Andreev Tunneling Observed on a Carbon Nanotube Quantum Dot.

@article{Gramich2015ResonantAI,
  title={Resonant and Inelastic Andreev Tunneling Observed on a Carbon Nanotube Quantum Dot.},
  author={Jorg Gramich and Andreas Baumgartner and Christian Sch{\"o}nenberger},
  journal={Physical review letters},
  year={2015},
  volume={115 21},
  pages={
          216801
        }
}
We report the observation of two fundamental subgap transport processes through a quantum dot (QD) with a superconducting contact. The device consists of a carbon nanotube contacted by a Nb superconducting and a normal metal contact. First, we find a single resonance with position, shape, and amplitude consistent with the theoretically predicted resonant Andreev tunneling (AT) through a single QD level. Second, we observe a series of discrete replicas of resonant AT at a separation of ~145 μeV… 

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