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Conductance quantization in strongly disordered graphene ribbons

机译:强无序石墨烯带中的电导量化

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We present numerical studies of conduction in graphene nanoribbons with different types of disorder. We find that even when defect scattering depresses the conductance to values two orders of magnitude lower than 2e~2/h, equally spaced conductance plateaus occur at moderately low temperatures due to enhanced electron backscattering near subband edge energies if bulk vacancies are present in the ribbon. This work accounts quantitatively for the surprising conductance quantization observed by Lin et al. [Phys. Rev. B 78, 161409(R) (2008)] in ribbons with such low conductances.
机译:我们目前在石墨烯纳米带具有不同类型的障碍的传导的数值研究。我们发现即使当缺陷散射使电导值降低到比2e〜2 / h低两个数量级时,如果在带中存在大量空位,由于子带边缘能量附近的电子反向散射增强,在中等低温下也会发生等距电导平稳期。这项工作定量地解释了Lin等人观察到的令人惊讶的电导量化。 [物理修订版B 78,161409(R)(2008)]中具有如此低电导的色带。

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