Hyperfine-induced valley mixing and the spin-valley blockade in carbon-based quantum dots

  title={Hyperfine-induced valley mixing and the spin-valley blockade in carbon-based quantum dots},
  author={A. P'alyi and G. Burkard},
  journal={Bulletin of the American Physical Society},
  • A. P'alyi, G. Burkard
  • Published 2009
  • Physics, Materials Science
  • Bulletin of the American Physical Society
Hyperfine interaction (HFI) in carbon nanotube and graphene quantum dots is due to the presence of 13C atoms. We theoretically show that in these structures the short-range nature of the HFI gives rise to a coupling between the valley degree of freedom of the electron and the nuclear spin, in addition to the usual electron spin-nuclear spin coupling. We predict that this property of the HFI affects the Pauli blockade transport in carbon-based double quantum dots. In particular, we show that… Expand

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