A new mechanism of electron paramagnetic resonance in spherical zinc-blende semiconductor nanocrystals, based on the extended orbital motion of electrons in the entire nanocrystal, is presented. Quantum confinement plays a crucial role in making the resonance signal observable. The mechanism remains operative in nanocrystals with uniaxially distorted shape. A theoretical model based on the proposed mechanism is in good quantitative agreement with unusual ODMR spectra observed in nearly spherical CdSe nanocrystals.
@article{arxiv.cond-mat/0111200,
title = {Electron (hole) paramagnetic resonance of spherical CdSe nanocrystals},
author = {K. Gokhberg and A. Glozman and E. Lifshitz and T. Maniv and M. C. Schlamp and P. Alivisatos},
journal= {arXiv preprint arXiv:cond-mat/0111200},
year = {2009}
}