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arXiv 1701.08448cond-mat.mes-hallquant-ph
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二维材料中边缘磁等离子体激元驱动的非互易量子霍尔器件

Non-reciprocal quantum Hall devices with driven edge magnetoplasmons in 2-dimensional materials

Stefano Bosco, David Peter DiVincenzo

摘要:

我们开发了一个理论,描述了非互易设备采用2维材料的量子霍尔制度电容耦合到外部电极的响应。由于这些器件中的传导被认为与边缘磁等离子体激元(EMP)有关,我们首先使用随机相位近似中的线性响应理论研究EMP问题。我们的模型可以包含几个案例,这些案例在文献中经常以不同的理由进行处理。特别是,我们分析了等离子体激元激发支持的光滑和尖锐的约束势在2维电子气,在单层石墨烯,我们指出这些材料的相似性和差异。我们还占一般的时间依赖性的外部驱动器应用到系统。最后,我们描述了一个非互易量子霍尔器件的行为:响应包含额外的谐振功能,这是没有预见到从以前的模型。

英文摘要:

We develop a theory that describes the response of non-reciprocal devices employing 2-dimensional materials in the quantum Hall regime capacitively coupled to external electrodes. As the conduction in these devices is understood to be associated to the edge magnetoplasmons (EMPs), we first investigate the EMP problem by using the linear response theory in the random phase approximation. Our model can incorporate several cases, that were often treated on different grounds in literature. In particular, we analyze plasmonic excitations supported by smooth and sharp confining potential in 2-dimensional electron gas, and in monolayer graphene, and we point out the similarities and differences in these materials. We also account for a general time-dependent external drive applied to the system. Finally, we describe the behavior of a non-reciprocal quantum Hall device: the response contains additional resonant features, which were not foreseen from previous models.

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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