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首页> 外文期刊>Physical review >Photovoltaic oscillations due to edge-magnetoplasmon modes in a very high-mobility two-dimensional electron gas
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Photovoltaic oscillations due to edge-magnetoplasmon modes in a very high-mobility two-dimensional electron gas

机译：极高迁移率二维电子气中边缘磁等离子体激元模式引起的光伏振荡

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摘要

Using very high-mobility GaAs/Al_xGa_(1-x)As two-dimensional electron Hall bar samples, we have experimentally studied the photoresistance and/or photovoltaic oscillations induced by microwave irradiation in the regime where both 1/B and B-periodic oscillations can be observed. In the frequency range between 27 and 130 GHz, we found that these two types of oscillations are decoupled from each other, consistent with the respective models that 1/B oscillations occur in bulk while the B oscillations occur along the edges of the Hall bars. In contrast to the original report of this phenomenon [1. V. Kukushkin et al., Phys. Rev. Lett. 92, 236803 (2004)], the periodicity of the B oscillations in our samples is found to be independent of L, the length of the Hall bar section between voltage measuring leads.
机译：使用极高迁移率的GaAs / Al_xGa_（1-x）As二维电子霍尔棒样品，我们在1 / B和B周期振荡的情况下，通过实验研究了微波辐射引起的光阻和/或光伏振荡可以观察到。在27至130 GHz的频率范围内，我们发现这两种类型的振动是相互解耦的，这与相应的模型一致：1 / B振动大量发生，而B振动沿霍尔棒的边缘发生。与这种现象的原始报道相反[1。 V.Kukushkin等，Phys。牧师92，236803（2004）]，我们发现样本中B振荡的周期与L（电压测量线之间霍尔棒部分的长度）无关。

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