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arXiv 1012.5820cond-mat.mes-hallcond-mat.mtrl-sci
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石墨烯多层膜的半经典Boltzmann输运理论

Semiclassical Boltzmann transport theory for graphene multilayers

Hongki Min, Parakh Jain, S. Adam, M. D. Stiles

摘要:

我们计算任意堆叠的多层石墨烯片的弛豫时间近似内的导电性,同时考虑短程和长程杂质。我们从理论上探讨的可行性,确定这些多层膜的堆叠顺序使用运输测量。对于相对干净的样品,各种堆叠配置的电导率取决于载流子密度作为一个幂律超过二十年。这种依赖性是由多层能带结构的低密度分解为手性哈密顿量之和引起的。对于脏样本,简单的幂律关系不再成立。尽管如此,通过仔细比较实验数据和这里给出的结果,仍然可以识别层的数量和堆叠顺序。

英文摘要:

We calculate the conductivity of arbitrarily stacked multilayer graphene sheets within a relaxation time approximation, considering both short-range and long-range impurities. We theoretically investigate the feasibility of identifying the stacking order of these multilayers using transport measurements. For relatively clean samples, the conductivities of the various stacking configurations depend on the carrier density as a power-law for over two decades. This dependence arises from a low density decomposition of the multilayer band structure into a sum of chiral Hamiltonians. For dirty samples, the simple power-law relationship no longer holds. Nonetheless, identification of the number of layers and stacking sequence is still possible by careful comparison of experimental data to the results presented here.

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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