Probing Two-Electron Multiplets in Bilayer Graphene Quantum Dots.

  title={Probing Two-Electron Multiplets in Bilayer Graphene Quantum Dots.},
  author={S. M{\"o}ller and Luca Banszerus and Angelika Knothe and C. Steiner and Eike Icking and S. Trellenkamp and Florian Lentz and K. Watanabe and T. Taniguchi and Leonid I. Glazman and Vladimir I. Fal’ko and Christian Volk and Christoph Stampfer},
  journal={Physical review letters},
  volume={127 25},
We report on finite bias spectroscopy measurements of the two-electron spectrum in a gate defined bilayer graphene (BLG) quantum dot for varying magnetic fields. The spin and valley degree of freedom in BLG give rise to multiplets of six orbital symmetric and ten orbital antisymmetric states. We find that orbital symmetric states are lower in energy and separated by ≈ 0.4-0.8  meV from orbital antisymmetric states. The symmetric multiplet exhibits an additional energy splitting of its six… 

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