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arXiv 2004.13275cond-mat.mes-hall
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二维材料中的声磁电效应:几何共振和外斯振荡

Acoustomagnetoelectric effect in two-dimensional materials: Geometric resonances and Weiss oscillations

I. G. Savenko, A. V. Kalameitsev, L. G. Mourokh, V. M. Kovalev

摘要:

利用半经典玻尔兹曼方程方法研究了在表面声波和外加磁场作用下,二维抛物型和线性(石墨烯)色散介质中的电子输运.我们观察到的振荡行为的纵向和霍尔电流的表面声波频率的函数在一个固定的磁场和作为函数的反磁场在一个固定的频率的声波。我们解释了前者的几何共振现象,而我们涉及到后者的魏斯样振荡中存在的动态超晶格所产生的声波。从而证明了二维电子气中声磁电效应的双重性。

英文摘要:

We study electron transport in two-dimensional materials with parabolic and linear (graphene) dispersions of the carriers in the presence of surface acoustic waves and an external magnetic field using semiclassical Boltzmann equations approach. We observe an oscillatory behavior of both the longitudinal and Hall electric currents as functions of the surface acoustic wave frequency at a fixed magnetic field and as functions of the inverse magnetic field at a fixed frequency of the acoustic wave. We explain the former by the phenomenon of geometric resonances, while we relate the latter to the Weiss-like oscillations in the presence of the dynamic superlattice created by the acoustic wave. Thus we demonstrate the dual nature of the acoustomagnetoelectric effect in two-dimensional electron gas.

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