Abstract
We observed up to 15 paramagnetic resonance Raman lines due to collective multiple spin flips within the Zeeman split ground state in a quantum well structure with semimagnetic wells and nonmagnetic barriers with external magnetic fields T. This effect appears near resonance with the heavy-hole transitions of narrow quantum wells in the Voigt backscattering geometry and can be explained by a precession of the total spin of all ions in the sum of external and exchange field ( ), the latter produced by the heavy hole.
- Received 7 October 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.2567
©1995 American Physical Society