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arXiv 1302.6985cond-mat.mes-hall
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耦合空穴的价带有效势演化

Valence-band effective-potential evolution for coupled holes

J. J. Flores-Godoy, A. Mendoza-Álvarez, L. Diago-Cisneros, G. Fernández-Anaya

摘要:

我们提出了变态的层状异质结构的有效电位分布,为几个III-V族半导体二元化合物,当轻,重空穴的带混合增加。一个根轨迹样的程序,直接适用于从耦合模的多通道系统的特征值二次问题,在多带有效质量近似的上下文中。通过让增长的价带混合,它表明标准的固定高度的矩形势能的散射体分布,是一个可靠的测试运行输入重空穴。相反,该方案不再是有效的轻空穴和可变的有效\emph{band offset}的配置文件,而必须考虑,每当面内动能的变化。

英文摘要:

We present the metamorphosis in the effective-potential profile of layered heterostructures, for several III-V semiconductor binary compounds, when the band mixing of light and heavy holes increases. A root-locus-like procedure, is directly applied to an eigenvalue quadratic problem obtained from a multichannel system of coupled modes, in the context of multiband effective mass approximation. By letting grow valence-band mixing, it is shown the standard fixed-height rectangular potential-energy for the scatterer distribution, to be a reliable test-run input for heavy holes. On the contrary, this scheme is no longer valid for light holes and a mutable effective \emph{band offset} profile has to be considered instead, whenever the in-plane kinetic energy changes.

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