arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.4285cond-mat.mes-hall
收藏

石墨烯基法布里-珀罗器件中的AC传输

AC transport in graphene-based Fabry-Perot devices

Claudia G. Rocha, Luis E. F. Foa Torres, Gianaurelio Cuniberti

摘要:

我们报告的理论研究的影响,时间依赖的领域对电子输运通过石墨烯纳米器件。法布里-珀罗干涉图案通过交流门控以强烈依赖于石墨烯边缘形状的方式进行修改。虽然扶手椅边缘的图案被发现是规则的,可以非常有效地控制通过调整交流场,样品锯齿形边缘表现出更复杂的干涉图案,由于其独特的电子结构。这些研究强调了石墨烯纳米带的几何细节在相干传输机制中所起的主要作用。我们还扩展了我们的分析,噪声功率响应,确定在哪些条件下,它是可能的,以尽量减少电流波动,以及探索缩放特性的噪声与系统的长度和宽度。

英文摘要:

We report on a theoretical study of the effects of time-dependent fields on electronic transport through graphene nanoribbon devices. The Fabry-Pérot interference pattern is modified by an ac gating in a way that depends strongly on the shape of the graphene edges. While for armchair edges the patterns are found to be regular and can be controlled very efficiently by tuning the ac field, samples with zigzag edges exhibit a much more complex interference pattern due to their peculiar electronic structure. These studies highlight the main role played by geometric details of graphene nanoribbons within the coherent transport regime. We also extend our analysis to noise power response, identifying under which conditions it is possible to minimize the current fluctuations as well as exploring scaling properties of noise with length and width of the systems.

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。

↑