Gate-controlled one-dimensional channel on the surface of a 3D topological insulator.

@article{Yokoyama2010GatecontrolledOC,
  title={Gate-controlled one-dimensional channel on the surface of a 3D topological insulator.},
  author={Takehito Yokoyama and Alexander V. Balatsky and Naoto Nagaosa},
  journal={Physical review letters},
  year={2010},
  volume={104 24},
  pages={
          246806
        }
}
We investigate the formation of one-dimensional channels on the topological surface under the gate electrode. The energy dispersion of these channels is almost linear in momentum, and its velocity and sign are sensitively dependent on the strength of the gate voltage. Consequently, the local density of states near the gated region has an asymmetric structure with respect to zero energy. In the presence of the electron-electron interaction, the correlation effect can be tuned by the gate voltage… 
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