本文研究了半导体超晶格热电材料的声子谱、群速度和热导率等热输运问题，重点通过对声学声子群速度特性的研究来理解超晶格材料的导热性质。
In this paper, the heat transport characteristics such as the phonon spectrum, the group velocity and the thermal conductivity of the semiconductor superlattice thermoelectric materials were studied.
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。
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.
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