半导体量子阱二维电子气谱函数中的卫星结构：GW加累积量研究
Satellite structures in the spectral functions of semiconductor quantum well two-dimensional electron gases: a GW plus cumulant study
摘要：
本文用GW+累积量方法计算了不同电子密度下半导体量子阱中二维电子气的谱函数和单粒子态密度。我们比较我们的结果GW只计算，并发现显着差异的卫星之间的两个理论的描述：而GW理论预测的等离子体激发的存在，没有这样的激发被发现在GW+累积量理论。我们比较我们的结果从半导体量子阱的实验隧穿光谱，并找到很好的协议的卫星属性。
英文摘要：
We present theoretical calculations for the spectral functions and single-particle densities of states of the two-dimensional electron gas in semiconductor quantum wells at different electron densities using the GW+cumulant method. We compare our results to GW only calculations and find significant differences in the description of the satellites between the two theories: while GW theory predicts the existence of a plasmaron excitation, no such excitation is found in GW+cumulant theory. We compare our results to experimental tunneling spectra from semiconductor quantum wells and find good agreement for the satellite properties.
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