非线性电子输运中声学和光学声子的联合散射效应

本文简略地描述了一个处理恒定电场中非线性电子输运的新方法,并用它讨论强场中声学和光学声子的联合散射效应。我们发现,虽然当光学声子散射能力较强时有可能在电流-电场曲线中出现一段比较平坦的区域,原来只考虑光学声子散射时在高场下的电流饱和现象现在却消失了。对足够高的电流密度,声学声子总是重要的。 关键词：

EFFECT OF COMBINED ACOUSTIC AND OPTICAL PHONON SCATTERING IN NONLINEAR ELECTRONIC TRANSPORT

A new approach to nonlinear electronic transport in solids is described briefly and is applied to the discussion of combined acoustic and optical phonon. scattering. It is found that although a relatively flat region may exist in the currenit-versus-field curve if the scattering by optical phonon is strong, the saturation of the current density, which occurs in the case of pure optical scattering, disappears and the acoustic phon-ons are always important at high current density.