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首页> 外文期刊>Physica, B. Condensed Matter >Tripole current oscillations in superlattices
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Tripole current oscillations in superlattices

机译:超晶格中的三极电流振荡

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摘要

Based on a microscopic sequential tunneling model, we analyze the dynamical evolution of the charge density in a superlattice (SL) for fixed external voltage in the regime of self-sustained current oscillations. We find oscillations which involve two accumulation layers and one depletion layer simultaneously (tripole oscillations). Depending on the external voltage, two different scenarios are possible. For low voltages, all three charge monopoles (fronts) traverse the SL from the emitter to the collector, while for higher voltages, the depletion front catches up with the leading accumulation front, and both annihilate. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 24]
机译:基于微观顺序隧穿模型,我们分析了在自持电流振荡状态下,固定外部电压下超晶格(SL)中电荷密度的动态演化。我们发现振荡同时涉及两个累积层和一个耗尽层(三极振荡)。根据外部电压,可能有两种不同的情况。对于低电压,所有三个电荷单极(前沿)从发射极到集电极穿越SL,而对于较高电压,耗尽前沿追上领先的累积前沿,并且都消失。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:24]

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