Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures
Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures
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DOI：
10.7567/1347-4065/aafd94
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发表时间：
2019-02
影响因子：
1.5
通讯作者：
R. Kaji;R. Matsusaki;Sota Yamamoto;S. Adachi
中科院分区：
文献类型：
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作者：
R. Kaji;R. Matsusaki;Sota Yamamoto;S. Adachi
核自旋涨落（NSF）导致电子自旋严重弛豫，是各种自旋应用的热点问题之一。在这项研究中，我们展示了方便的方法，直接评估的NSF通过利用单个In 0.75Al 0.25As/Al 0.3Ga 0.7As量子点和InAs/GaAs量子环的核自旋开关。我们的方法使用的光致发光信号与时间积分模式，可以利用在个别纳米结构与弱信号强度。此外，演示的方法可以用来确定电子和空穴有效g因子的符号和大小，这是描述耦合的电子-核自旋系统的动力学的关键参数。
The nuclear spin fluctuation (NSF) induces a severe electron spin relaxation and is one of the hot issues for various spin-based applications. In this study, we demonstrate the convenient method for the direct evaluation of the NSF by utilizing the nuclear spin switch in single In0.75Al0.25As/Al0.3Ga0.7As quantum dots and InAs/GaAs quantum rings. Our method uses the photoluminescence signals with time-integrated mode and can be utilized in the individual nanostructures with weak signal intensities. Further, the demonstrated method can be used to determine the sign and magnitude of electron and hole effective g factors, which are the key parameters describing the dynamics of a coupled electron-nuclear spin system.