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arXiv 0901.2893cond-mat.mes-hallcond-mat.mtrl-sci
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量子点中电子-电子相互作用和电子复合物精细结构的自旋轨道效应

Spin-orbit effect on electron-electron interaction and fine structure of electron complexes in quantum dots

M. M. Glazov, V. D. Kulakovskii

摘要:

从理论上研究了自旋轨道效应对电子-电子相互作用的影响。导出了自旋轨道耦合对量子阱电子库仑相互作用的修正。应用所发展的理论计算了小横向盘状量子点中电子对三重态的能谱精细结构。我们证明了在各向异性量子点中三重态的自旋简并度被完全提升。各向同性量子点还表现出由自旋-轨道相互作用引起的三重态的特殊精细结构。

英文摘要:

Spin-orbit effects on electron-electron interaction are studied theoretically. The corrections to the Coulomb interaction of quantum well electrons induced by the spin-orbit coupling are derived. The developed theory is applied to calculate the energy spectrum fine structure of an electron pair triplet states localized in small lateral disk-shaped quantum dots. We show that the spin degeneracy of a triplet state is completely lifted in anisotropic quantum dots. Isotropic quantum dots also demonstrate peculiar fine structure of triplet states caused by the spin-orbit interaction.

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