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arXiv 0903.4765cond-mat.mes-hall
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栅压控制三势垒共振隧穿二极管的自洽Wigner分布函数研究

Self-consistent Wigner distribution function study of gate-voltage controlled triple-barrier resonant tunnelling diode

P. Wojcik, B. J. Spisak, M. Woloszyn, J. Adamowski

摘要:

用Wigner-Poisson问题的自洽数值方法研究了电子输运在三势垒共振隧穿二极管(TBRTD)中的输运。通过TBRTD的电子流可以由施加到势阱区之一的栅极电压控制。对于不同的栅极电压值,我们已经确定的电流-电压特性,势能分布,和电子密度分布。我们已经发现的峰谷比的增强(高达$\sim$ 10),在负微分电阻区域内的线性电流与偏置电压的行为的外观,和电流-电压特性的双稳态。自洽势能分布和电子密度分布的分析,使我们能够提供这些属性的物理解释。

英文摘要:

The electron transport through the triple-barrier resonant tunnelling diode (TBRTD) have been studied by the self-consistent numerical method for the Wigner-Poisson problem. The electron flow through the TBRTD can be controlled by the gate voltage applied to one of the potential well regions. For different gate voltage values we have determined the current-voltage characteristics, potential energy profiles, and electron density distribution. We have found the enhancement of the peak-to-valley ratio (up to $\sim$10), the appearance of the linear current versus bias voltage behaviour within the negative-differential resistance region, and the bistability of the current-voltage characteristics. The analysis of the self-consistent potential energy profiles and electron density distribution allowed us to provide a physical interpretation of these properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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