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Inter-subband structure factor for a quasi-one-dimensional polaron gas

机译:一维极化子气体的子带间结构因子

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In this work, the collective excitation spectra of quasi-one-dimensional plasmon in a rectangular GaAs quantum wire is investigated. Our calculations are performed within the Singwi, Tosi, Land and Sjiilander (STLS) self-consistent theory taking into account the plasmon longitudinal optical (LO) phonon coupling effects. We have employed a three subband model with only the first subband occupied by electrons and we have considered intra-subband and inter-subband transitions. We show that the polaronic effects cause the appearance of dips and oscillations in the static structure factor dispersion relation, which are directly related with the oscillator strength transfer between the collective excitation energy branches. We have also observed oscillations in the pair correlation function that are characteristic of inter-subband transitions and it denotes partial localization of the particle.
机译:在这项工作中,研究了矩形GaAs量子线中准一维等离子体激元的集体激发光谱。我们的计算是在Singwi,Tosi,Land和Sjiilander(STLS)自洽理论中进行的,其中考虑了等离振子纵向光学(LO)声子耦合效应。我们采用了三个子带模型,其中只有第一个子带被电子占据,并且我们考虑了子带内和子带间过渡。我们表明,极化子效应导致静态结构因子色散关系中出现骤降和振荡,这与集体激发能分支之间的振荡器强度传递直接相关。我们还观察到了成对相关函数中的振荡,这是子带间跃迁的特征,它表示粒子的局部定位。

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