Spin-magnetophonon level splitting in a quantum well made of a semimagnetic wide gap semiconductor is considered. The semimagnetic semiconductors are characterized by a large effective g factor. The resonance conditions ℏωLO=μBgB for the spin flip between two Zeeman levels due to interaction with longitudinal optical phonons can be achieved sweeping magnetic field B. This condition is studied in quantum wells. It is shown that it leads to a level splitting that is dependent on the electron-phonon coupling strength as well as on the spin-orbit interaction in this structure. We treat in detail the Rashba model for the spin-orbit interaction assuming that the quantum well lacks inversion symmetry and briefly discuss other models. The resonant transmission and reflection of light by the well is suggested as a suitable experimental probe of the level splitting.
@article{arxiv.0804.4654,
title = {Spin-magnetophonon level splitting in semimagnetic quantum wells},
author = {V. L. Gurevich and M. I. Muradov},
journal= {arXiv preprint arXiv:0804.4654},
year = {2009}
}