Direct observation of correlation time of dynamic nuclear polarization in single quantum dots

Details Direct observation of correlation time of dynamic nuclear polarization in single quantum dots Direct observation of correlation time of dynamic nuclear polarization in single quantum dots

2011-08-26

arxiv.org/abs/1108.5239v1

Physics

Condensed Matter

Materials Science

6 pages, 3 figures

Scientific paper

The spin interaction between an electron and nuclei was investigated optically in a single self-assembled InAlAs quantum dot (QD). In spin dynamics, the correlation time of the coupled electron-nuclear spin system and the electron spin relaxation time play a crucial role. We examined on a positively charged exciton in a QD to evaluate these key time constants directly via the temporal evolution measurements of the Overhauser shift and the degree of circular polarization. In addition, the validity of our used spin dynamics model was discussed in the context of the experimentally obtained key parameters.

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