Molecule States in a Gate Tunable Graphene Double Quantum Dot

L. J. Wang; H. O. Li; Z. Su; T. Tu; G. Cao; C. Zhou; X. J. Hao; G. C. Guo; G. P. Guo

doi:10.1063/1.3676083

Molecule States in a Gate Tunable Graphene Double Quantum Dot

Mesoscale and Nanoscale Physics 2015-05-20 v1

Authors: L. J. Wang , H. O. Li , Z. Su , T. Tu , G. Cao , C. Zhou , X. J. Hao , G. C. Guo , G. P. Guo

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Abstract

We have measured a graphene double quantum dot device with multiple electrostatic gates that are used to enhance control to investigate it. At low temperatures the transport measurements reveal honeycomb charge stability diagrams which can be tuned from weak to strong interdot tunnel coupling regimes. We precisely extract a large interdot tunnel coupling strength for this system allowing for the observation of tunnel-coupled molecular states extending over the whole double dot. This clean, highly controllable system serves as an essential building block for quantum devices in a nuclear-spin-free world.

Keywords

quantum dots and electron transport quantum gates and qubits graphene transport and valleytronics

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@article{arxiv.1011.5347,
  title  = {Molecule States in a Gate Tunable Graphene Double Quantum Dot},
  author = {L. J. Wang and H. O. Li and Z. Su and T. Tu and G. Cao and C. Zhou and X. J. Hao and G. C. Guo and G. P. Guo},
  journal= {arXiv preprint arXiv:1011.5347},
  year   = {2015}
}

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10 pages, 14 figures

Molecule States in a Gate Tunable Graphene Double Quantum Dot

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