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首页> 外文期刊>Physica, B. Condensed Matter >Role of staircase potential in the energy spectrum of a periodic system
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Role of staircase potential in the energy spectrum of a periodic system

机译：阶梯势在周期性系统能谱中的作用

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An exhaustive study on the energy spectrum and the wave functions of semiconductor superlattices (SLs) in the presence of saw-tooth potential, step potential and the combined potential has been carried out. The study uses a realistic model for the SL based on the periodic crystal potential of the host crystals. The application of the staircase potential results in the formation of discrete Wannier-Stark ladder (WSL) which is experimentally exploited to achieve quantum cascade laser. The conditions for the WSL in SL has been pointed out. For the purpose of comparison, the effect of these potentials on the energy spectrum and the wave functions has also been reported for a single crystal.
机译：在存在锯齿形电势，阶跃电势和组合电势的情况下，对半导体超晶格（SLs）的能谱和波函数进行了详尽的研究。这项研究基于基质晶体的周期性晶体电势，为SL使用了一个现实模型。阶梯电位的应用导致形成离散的Wannier-Stark阶梯（WSL），该阶梯被实验性地用于实现量子级联激光。指出了SL中WSL的条件。为了进行比较，还已经报道了这些势对单晶的能谱和波函数的影响。

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