ENHANCEMENT OF SPIN SPLITTING DUE TO SPATIAL CONFINEMENT IN INXGA1-XAS QUANTUM DOTS

被引：21

作者：

BAYER, M

TIMOFEEV, VB

GUTBROD, T

FORCHEL, A

STEFFEN, R

OSHINOWO, J

机构：

[1] Technische Physik, Universität Würzburg, D-97074 Würzburg, Am Hubland

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.52.R11623

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The splitting between the sigma(+) and the sigma(-) polarized spectral lines that arise from the ground-state transitions of InxGa1-xAs quantum dots has been investigated by photoluminescence studies in magnetic fields up to B = 8 T. We find that the difference in energy between these two lines increases drastically with decreasing dot diameter. This increase is attributed to the enhancement of the g factor of the hole ground state with zero angular momentum, which obtains admixtures of hole states with nonzero orbital angular momenta. The admixtures originate from the strong spin-orbit interaction in the valence band that is increased by the spatial confinement.

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收藏

页码：11623 / 11625

页数：3

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