Electronic Dephasing in the Quantum Hall Regime
arXiv:cond-mat/9910434 · doi:10.1103/PhysRevLett.83.4646
Abstract
By means of degenerate four-wave mixing (FWM), we investigate the quantum coherence of electron-hole pairs in the presence of a two-dimensional electron gas in modulation-doped GaAs-AlGaAs quantum wells in the quantum Hall effect regime. With increasing magnetic field, we observe a crossover from Markovian to non-Markovian behavior, as well as large jumps in the decay time of the FWM signal at even Landau level filling factors. The main observations can be qualitatively reproduced by a model which takes into account scattering by the collective excitations of the two-dimensional electron gas.
10 pages including 3 figs. To appear in Phys. Rev. Lett
Cited by in corpus (6)
- Many-body Correlation Effects in the Ultrafast Nonlinear Optical Response of Confined Fermi Seas
- Spin correlations in nonlinear optical response: Light-induced Kondo effect
- Ultrafast Nonlinear Optical Response of Strongly Correlated Systems: Dynamics in the Quantum Hall Effect Regime
- Ultrafast Coulomb-induced dynamics of 2D magnetoexcitons
- Theory of ultrafast exciton dynamics in the Quantum Hall system
- Fermi-edge singularities in linear and non-linear ultrafast spectroscopy