Gate tunable current partition in graphene based topological zero lines

@article{Ren2017GateTC,
  title={Gate tunable current partition in graphene based topological zero lines},
  author={Yafei Ren and Ke Wang and Xinzhou Deng and Shengyuan A. Yang and Jeil Jung and Zhenhua Qiao},
  journal={Physical Review B},
  year={2017},
  volume={95},
  pages={245420}
}
We demonstrate new mechanisms for gate tunable current partition at topological zero-line intersections in a graphene-based current splitter. Based on numerical calculations of the non-equilibrium Green's functions and Landauer-Buttiker formula, we show that the presence of a perpendicular magnetic field on the order of a few Teslas allows for carrier sign dependent current routing. In the zero-field limit the control on current routing and partition can be achieved within a range of $10… 

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