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Spin inertia of resident and photoexcited carriers in singly charged quantum dots

机译：单电荷量子点中常驻和光激发载流子的自旋惯性

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摘要

The spin dynamics in a broad range of systems can be studied using circularly polarized optical excitation with alternating helicity. The dependence of spin polarization on the frequency of helicity alternation, known as the spin inertia effect, is used here to study the spin dynamics in singly charged (In,Ga)As/GaAs quantum dots (QDs), providing insight into spin generation and accumulation processes. We demonstrate that the dependence of spin polarization in n- and p-type QDs on the external magnetic field has a characteristic V- and M-like shape, respectively. This difference is related to different microscopic mechanisms of the resident carriers' spin orientation. It allows us to determine the parameters of the spin dynamics both for the ground and excited states of singly charged QDs.
机译：可以使用具有交替螺旋度的圆偏振光激发来研究各种系统中的自旋动力学。自旋极化对螺旋度交替频率的依赖性（称为自旋惯性效应）在这里用于研究单电荷（In，Ga）As / GaAs量子点（QDs）中的自旋动力学，从而深入了解自旋的产生和积累过程。我们证明，在n型和p型QD中自旋极化对外部磁场的依赖性分别具有特征性的V型和M型形状。这种差异与驻留载体旋转方向的不同微观机制有关。它使我们能够确定单电荷量子点的基态和激发态的自旋动力学参数。

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  • 来源
    《Physical review》 |2018年第12期|121304.1-121304.5|共5页
  • 作者

    E. A. Zhukov; E. Kirstein; D. S. Smirnov; D. R. Yakovlev; M. M. Glazov; D. Reuter; A. D. Wieek; M. Bayer; A. Greilich;

  • 作者单位

    Experimentelle Physik 2, Technische Universitaet Dortmund, 44221 Dortmund, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, 44221 Dortmund, Germany;

    Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;

    Experimentelle Physik 2, Technische Universitaet Dortmund, 44221 Dortmund, Germany,Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;

    Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;

    Department Physik, Universitdt Paderborn, 33098 Paderbom, Germany;

    Angewandte Festkoerperphysik, Ruhr-Universitaet Bochum, 44780 Bochum, Germany;

    Experimentelle Physik 2, Technische Universitaet Dortmund, 44221 Dortmund, Germany,Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;

    Experimentelle Physik 2, Technische Universitaet Dortmund, 44221 Dortmund, Germany;

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