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Electron flow in circular n−p junctions of bilayer graphene

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2009

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Cserti, József

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https://doi.org/10.1103/PhysRevB.80.075416
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http://arxiv.org/abs/0905.3467v3

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Physical Review B. American Physical Society (APS). 2009, 80(7), 075416. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.80.075416

Zusammenfassung

We present a theoretical study of electron wave functions in ballistic circular n−p junctions of bilayer graphene. Similarly to the case of a circular n−p junction of monolayer graphene, we find that (i) the wave functions form caustics inside the circular region and (ii) the shape of these caustics are well described by a geometrical optics model using the concept of a negative refractive index. In contrast to the monolayer case, we show that the strong focusing effect is absent in the bilayer. We explain these findings in terms of the angular dependence of Klein tunneling at a planar n−p junction.

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ISO 690PÉTERFALVI, Csaba G., András PÁLYI, József CSERTI, 2009. Electron flow in circular n−p junctions of bilayer graphene. In: Physical Review B. American Physical Society (APS). 2009, 80(7), 075416. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.80.075416
BibTex
@article{Peterfalvi2009Elect-57986,
  year={2009},
  doi={10.1103/PhysRevB.80.075416},
  title={Electron flow in circular n−p junctions of bilayer graphene},
  number={7},
  volume={80},
  issn={2469-9950},
  journal={Physical Review B},
  author={Péterfalvi, Csaba G. and Pályi, András and Cserti, József},
  note={Article Number: 075416}
}
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