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arXiv 1202.0053cond-mat.mes-hall
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无序半导体电子双层膜的层间输运

Interlayer Transport in Disordered Semiconductor Electron Bilayers

Youngseok Kim, Brian Dellabetta, Matthew J. Gilbert

摘要:

通过自洽量子输运计算,研究了无序对量子霍尔体系外无序半导体双层膜层间输运性质的影响。我们发现,除了材料的无序系统影响层间相互作用,导致显着偏差的层间传输特性。特别是,我们发现,无序减少和扩大的隧穿峰,有效地减少相互作用系统的非相互作用系统,当电子的平均自由程变得比系统长度短。我们的研究结果表明,在半导体双层交换增强层间输运的实验观察需要材料的平均自由程大于系统的空间范围。

英文摘要:

We study the effects of disorder on the interlayer transport properties of disordered semiconductor bilayers outside of the quantum Hall regime by performing self-consistent quantum transport calculations. We find that the addition of material disorder to the system affects interlayer interactions leading to significant deviations in the interlayer transfer characteristics. In particular, we find that disorder decreases and broadens the tunneling peak, effectively reducing the interacting system to the non-interacting system, when the mean-free path for the electrons becomes shorter than the system length. Our results suggest that the experimental observation of exchange-enhanced interlayer transport in semiconductor bilayers requires materials with mean-free paths larger than the spatial extent of the system.

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