Excitons in motion: universal dependence of the magnetic moment on kinetic energy

Excitons in motion: universal dependence of the magnetic moment on kinetic energy
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运动中的激子:磁矩对动能的普遍依赖性

DOI:
10.1002/pssb.200777614
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发表时间:
2008
期刊:
physica status solidi (b)
影响因子:
--
通讯作者:
Kochereshko V
Kochereshko V
中科院分区:
--
文献类型:
--
作者:
Kochereshko V

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我们已经观察到激子在获得动能时,其磁性会发生显著的变化。特别地,当磁场沿着生长方向作用于CdTe,ZnSe,ZnTe和GaAs的(001)宽量子威尔斯阱时,激子跃迁的塞曼分裂和抗磁位移与平移波矢Kz有很强的依赖关系.塞曼分裂的行为对应于激子磁矩的增强。当它们的平移动能变得与激子里德伯相当时,这种增强特别明显,并且可以用Kz的通用函数来描述。的行为的模型概述,其中涉及运动诱导的混合之间的1S类氢激子基态和激发态。这些观测结果表明,激子的结构有显着的变化,因为它的平移动能增加。(© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA,魏因海姆)
We have observed remarkable changes in the magnetic properties of excitons as they acquire kinetic energy. In particular, the Zeeman splittings and diamagnetic shifts of excitonic transitions when magnetic fields are applied along the growth direction of (001) wide quantum wells of CdTe, ZnSe, ZnTe and GaAs are found to to have a strong dependence on the translational wavevectorKz. The behaviour of the Zee‐man splittings corresponds to enhancement of the magnetic moments of the excitons. This enhancement is particularly marked when their translational kinetic energy becomes comparable with the exciton Rydberg and can be described by what appears to be a universal function ofKz. A model for the behaviour is outlined which involves motionally‐induced mixing between the 1S hydrogenic exciton ground state and excited nP states. The observations imply that there are significant changes in the structure of the exciton as its translational kinetic energy increases. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
勘误表:磁场中闪锌矿型晶体中简并 1 s 激子的理论:交换相互作用和立方各向异性
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