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EXCITONS IN SOLID ARGON

机译:固态氩气中的激子

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摘要

A model for consistently describing the entire Ar exciton series is presented. Making use of a reliable approximation of the band structure in the whole first Brillouin zone, as provided by appropriately chosen Slater-Koster parameters, is an essential part of our approach. Its dominating effect on the final results is demonstrated by performing comparative studies based on several simpler band models. In fact, the energy defect of the n=1 exciton can to a large extent be understood as a consequence of the large-k variation of the bands. Our model, furthermore, makes allowance for the spin-orbit coupling of the valence bands, the exchange interaction and the dielectric function of the electron-hole potential. Without using any free parameter, the calculated Ar exciton series is in excellent agreement with the experimental binding energies. (C) 1995 American Institute of Physics. [References: 47]
机译:提出了用于一致描述整个Ar激子序列的模型。通过适当选择的Slater-Koster参数,在整个第一个布里渊区中使用能带结构的可靠近似值是我们方法的重要组成部分。通过基于几个较简单的波段模型进行比较研究,证明了其对最终结果的主导作用。实际上,由于谱带的大k值变化,可以在很大程度上理解n = 1激子的能量缺陷。此外,我们的模型考虑了价带的自旋轨道耦合,交换相互作用和电子-空穴势的介电函数。在不使用任何自由参数的情况下,计算出的Ar激子级数与实验结合能非常吻合。 (C)1995年美国物理研究所。 [参考:47]

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