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arXiv 1103.3192cond-mat.mes-hall
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耦合量子阱中激子能量随空间和温度变化的理论模拟

Theoretical modeling of spatial and temperature dependent exciton energy in coupled quantum wells

C. S. liu, H. G. Luo, W. C. Wu

摘要:

受耦合量子阱中激子平均能量分布随空间和温度变化的实验启发[S。Yang \textit{et al.},Phys.Rev.B \textbf{75},033311(2007)],我们研究了间接激子中相互作用的性质。基于不确定原理,以及温度和能量依赖的分布,其中包括人口和重组的影响,我们表明,吸引的两体相互作用和排斥的三体相互作用之间的相互作用可以导致一个自然的和良好的帐户的平均激子能量的非单调温度依赖性。此外,激子能量的最大值位于最亮的区域,与最近的实验一致。我们的结果为理解耦合量子阱中激子动力学的基本物理提供了一种新的途径。

英文摘要:

Motivated by a recent experiment of spatial and temperature dependent average exciton energy distribution in coupled quantum wells [S. Yang \textit{et al.}, Phys. Rev. B \textbf{75}, 033311 (2007)], we investigate the nature of the interactions in indirect excitons. Based on the uncertainty principle, along with a temperature and energy dependent distribution which includes both population and recombination effects, we show that the interplay between an attractive two-body interaction and a repulsive three-body interaction can lead to a natural and good account for the nonmonotonic temperature dependence of the average exciton energy. Moreover, exciton energy maxima are shown to locate at the brightest regions, in agreement with the recent experiments. Our results provide an alternative way for understanding the underlying physics of the exciton dynamics in coupled quantum wells.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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