首页> 外文期刊>Journal of Experimental and Theoretical Physics >Dynamics of nuclear polarization in inGaAs quantum dots in a transverse magnetic field
【24h】

Dynamics of nuclear polarization in inGaAs quantum dots in a transverse magnetic field

机译:横向磁场中inGaAs量子点中核极化的动力学

获取原文
获取原文并翻译 | 示例
           

摘要

The time-resolved Hanle effect is examined for negatively charged InGaAs/GaAs quantum dots. Experimental data are analyzed by using an original approach to separate behavior of the longitudinal and transverse components of nuclear polarization. This made it possible to determine the rise and decay times of each component of nuclear polarization and their dependence on transverse magnetic field strength. The rise and decay times of the longitudinal component of nuclear polarization (parallel to the applied field) were found to be almost equal (approximately 5 ms). An analysis of the transverse component of nuclear polariza- tion shows that the corresponding rise and decay times differ widely and strongly depend on magnetic field strength, increasing from a few to tens of milliseconds with an applied field between 20 and 100 mT. Current phenomenological models fail to explain the observed behavior of nuclear polarization. To find an explana- tion, an adequate theory of spin dynamics should be developed for the nuclear spin system of a quantum dot under conditions of strong quadrupole splitting.
机译:对带负电的InGaAs / GaAs量子点检查时间分辨的Hanle效应。通过使用原始方法分离核极化的纵向和横向分量的行为来分析实验数据。这样就可以确定核极化各成分的上升和衰减时间及其对横向磁场强度的依赖性。发现核极化的纵向分量(与施加的电场平行)的上升和衰减时间几乎相等(大约5 ms)。对核极化的横向分量的分析表明,相应的上升和衰减时间相差很大,并且强烈取决于磁场强度,在20至100 mT的外加磁场下,磁场强度从几毫秒增加到几十毫秒。当前的现象学模型无法解释观察到的核极化行为。为了找到解释,在强四极分裂条件下,应为量子点的核自旋系统发展一个足够的自旋动力学理论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号