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首页> 外文期刊>Physical review >Edge magnetoplasmon transport in gated and ungated quantum Hall systems
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Edge magnetoplasmon transport in gated and ungated quantum Hall systems

机译：门控和非门控量子霍尔系统中的边缘磁等离子体传输

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摘要

Edge magnetoplasmon (EMP) transport in gated and ungated quantum Hall systems is investigated by time-of-flight measurements. We measured the velocity, the amplitude, and the broadening of the EMP pulse injected by applying a voltage pulse to an Ohmic contact. We show that the transverse width of EMPs in the ungated sample is determined by the potential profile .in the edge region, independent of the filling factor. In the gated sample, on the other hand, EMPs are confined by the innermost incompressible strip and their transverse width depends on the filling factor and the bulk electron density. We also find that scattering of EMPs by the bulk electrons is modified by the presence of the gate.
机译：通过飞行时间测量研究了门控和非门控量子霍尔系统中的边缘磁等离子体激元（EMP）传输。我们通过向欧姆接触施加电压脉冲来测量注入的EMP脉冲的速度，幅度和展宽。我们表明，去胶质样品中EMP的横向宽度取决于边缘区域中的电位分布，与填充因子无关。另一方面，在门控样品中，EMP受最里面的不可压缩条带限制，其横向宽度取决于填充因子和体电子密度。我们还发现，由于电子的存在，EMP的散射被栅电子所改变。

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