论文标题
在自组装的双量子点中，三胞胎和单线状态之间的声子辅助放松
Phonon-assisted relaxation between triplet and singlet states in a self-assembled double quantum dot
论文作者
论文摘要
我们研究了限制在自组装双量子点中的两个电子的理论上语音诱导的自旋动力学。我们计算自旋三旋转和旋转态状态的职业的过渡速率和时间演变。我们表征了各种弛豫通道的相对重要性与电场和磁场的函数。模拟基于结合八波段K.P方法和配置相互作用方法的模型。我们表明，在不同的点上扎伊曼双打之间的电子G因素不匹配打开了一个相对快速的三胞胎 - 单曲松弛通道。我们还证明，由于某些松弛通道消失，三胞胎平脚架抗骨架附近的放松被放慢到几个数量级。
We study theoretically phonon-induced spin dynamics of two electrons confined in a self-assembled double quantum dot. We calculate the transition rates and time evolution of occupations for the spin-triplet and spin-singlet states. We characterize the relative importance of various relaxation channels as a function of the electric and magnetic fields. The simulations are based on a model combining the eight-band k.p method and configuration-interaction approach. We show that the electron g-factor mismatch between the Zeeman doublets localized on different dots opens a relatively fast triplet-singlet relaxation channel. We also demonstrate, that the relaxation near the triplet-singlet anticrossing is slowed down up to several orders of magnitude due to vanishing of some relaxation channels.
