Nuclear spin coherence and relaxation dynamics of all constituent isotopes of an n-doped CdTe/(Cd,Mg)Te quantum well structure are studied employing optically detected nuclear magnetic resonance. Using time-resolved pump-probe Faraday ellipticity, we generate and detect the coherent spin dynamics of the resident electrons. The photogenerated electron spin polarization is transferred into the nuclear spin system, which becomes polarized and acts back on the electron spins as the Overhauser field. Under the influence of resonant radio frequency pulses, we trace the coherent spin dynamics of the nuclear isotopes 111Cd, 113Cd, and 125Te. We measure nuclear Rabi oscillations, the inhomogeneous dephasing time T2∗, the spin coherence time T2, and the longitudinal relaxation time T1. Furthermore, we investigate the influence of the laser excitation and the corresponding electron spin polarization on the nuclear spin relaxation time and find a weak extension of this time induced by interaction with the electron spins.
@article{arxiv.1807.09672,
title = {Nuclear spin dynamics influenced and detected by electron spin polarization in CdTe/CdMgTe quantum wells},
author = {E. Evers and T. Kazimierczuk and F. Mertens and D. R. Yakovlev and G. Karczewski and T. Wojtowicz and J. Kossut and M. Bayer and A. Greilich},
journal= {arXiv preprint arXiv:1807.09672},
year = {2019}
}