Blocking of the polaron effect and spin-split cyclotron resonance in a two-dimensional electron Gas
Cyclotron resonance (CR) of high density GaAs quantum wells exhibits well-resolved spin splitting above the LO-phonon frequency. The spin-up and spin-down CR frequencies are reversed relative to the order expected from simple band nonparabolicity. We demonstrate that this is a consequence of the blocking of the polaron interaction which is a sensitive function of the filling of the Landau levels.
Wu
XG
National Laboratory for Superlattice and Microstructure, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Peeters
FM
Wang
YJ
McCombe
BD