Cyclotron spin-wave in the 2D electron system

The cyclotron spin-wave mode of a two-dimensional electron system have been investigated by inelastic light scattering. It is observed at small electr on filling factors, nu similar to 0.1, when the electron system is spin-dep olarized. As long as the electron system becomes fully spin-polarized (nu > 0.2), the cyclotron spin-wave disappears from the inelastic light scatteri ng spectra. It reenters at electron filling factors nu > 1. Over the range of electron filling factors of 1 < nu < 2, the cyclotron spin-wave energy i s insensitive to both the experimentally accessible in-plane momenta and th e electron concentration, whereas its inelastic light scattering efficiency is strongly influenced by the spin polarization of the electron system. (C ) 2001 MAIK "Nauka/Interperiodica".