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arXiv 1104.5260cond-mat.mes-hall
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边缘无序下石墨烯纳米带的相干输运

Coherent transport through graphene nanoribbons in the presence of edge disorder

F. Libisch, S. Rotter, J. Burgdörfer

摘要:

我们模拟电子输运通过实验上可实现的尺寸(长度L高达2微米,宽度W约40 nm)的石墨烯纳米带在粗糙的边缘散射的存在下。我们的数值方法是基于一个模块化的递归格林函数技术,具有次线性缩放与L的计算工作。我们确定了破坏的A-B亚晶格(或手征)对称性和K-K'散射的影响,通过傅立叶光谱的个别散射状态。对于长带,我们发现安德森本地化的散射状态与一个定义良好的指数衰减超过10个数量级的振幅。

英文摘要:

We simulate electron transport through graphene nanoribbons of experimentally realizable size (length L up to 2 micrometer, width W approximately 40 nm) in the presence of scattering at rough edges. Our numerical approach is based on a modular recursive Green's function technique that features sub-linear scaling with L of the computational effort. We identify the influence of the broken A-B sublattice (or chiral) symmetry and of K-K' scattering by Fourier spectroscopy of individual scattering states. For long ribbons we find Anderson-localized scattering states with a well-defined exponential decay over 10 orders of magnitude in amplitude.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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