Abstract

The anisotropy of the conductivity and the shape of the I–V characteristics for a two-dimensional quantum superlattice with the nonharmonic electron dispersion law are investigated for different directions of the current and field applied to the structure relative to the superlattice axes. The anisotropy of the characteristics and the conditions for the occurrence of multivalue I–V characteristics in different current flow modes are discussed. It is shown that the deviation of the electron dispersion law in a two-dimensional quantum superlattice from the harmonic one in a strong dc electric field noticeably affects the shape of the I–V characteristic of a two-dimensional quantum superlattice. Several current peaks in a strong field are caused by both mixing of the current lines for directions orthogonal to the applied field and electron transport over Stark-ladder levels formed in different miniband valleys.

中文翻译：

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具有非缔合色散定律的二维量子超晶格中电子输运的特征

摘要

导电性的各向异性和的形状我- V用于与非谐波电子分散法的二维量子超晶格特性进行了研究用于当前的不同方向和场施加到相对于超晶格轴的结构。的特性和多值的发生条件的各向异性我- V在不同电流流动模式特性进行了讨论。结果表明，电子分散法在从谐波一个在强直流电场的二维量子超晶格的偏差显着影响的形状我- V二维量子超晶格的特性 强电场中的几个电流峰值是由于电流线在与施加电场正交的方向上的混合以及电子在不同微带谷中形成的Stark阶梯能级上的传输所引起的。