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arXiv 0811.4117cond-mat.mtrl-sci
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半导体量子点中带电激子磁光谱的库仑关联

Coulomb correlations evidenced in the magneto-optical spectra of charged excitons in semiconductor quantum dots

D. Y. Oberli, M. Byszewski, B. Chalupar, E. Pelucchi, A. Rudra, E. Kapon

摘要:

半导体量子点中带电激子的发射光谱图是在垂直于光子动量方向的磁场存在下由四重线偏振谱线组成的。通过测量量子点的塞曼分裂,我们得到了载流子的有效g因子,并发现空穴g因子对量子点的形状不对称性非常敏感。通过比较同一量子点中中性激子和带电激子的有效g因子,揭示了库仑关联在这些激子态中的作用。

英文摘要:

The emission spectral pattern of a charged exciton in a semiconductor quantum dot is composed of a quadruplet of linearly polarized lines in the presence of a magnetic field oriented perpendicularly to the direction of the photon momentum. By measuring the Zeeman splittings, we obtain the effective g factors of the carriers and find that the hole g factor is very sensitive to the QD shape asymmetry. By comparing the effective g factors obtained for the neutral and the charged excitons in the same quantum dot, we uncover the role of Coulomb correlations in these excitonic states.

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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