Controllable tunnel coupling and molecular states in a graphene double quantum dot


Journal Article

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. © 2012 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Wang, LJ; Li, HO; Tu, T; Cao, G; Zhou, C; Hao, XJ; Su, Z; Xiao, M; Guo, GC; Chang, AM; Guo, GP

Published Date

  • January 9, 2012

Published In

Volume / Issue

  • 100 / 2

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.3676083

Citation Source

  • Scopus