Coherent optical spectroscopy of electron scattering in a two-dimensional electron gas in high magnetic fields

S. Bar-Ad; I. Bar-Joseph; Y. Levinson; H. Shtrikman

doi:10.1103/PhysRevLett.72.776

Coherent optical spectroscopy of electron scattering in a two-dimensional electron gas in high magnetic fields

S. Bar-Ad, I. Bar-Joseph, Y. Levinson, and H. Shtrikman

Phys. Rev. Lett. 72, 776 – Published 31 January 1994

Abstract

We use time resolved four wave mixing to study electron scattering in modulation doped GaAs quantum wells in high magnetic fields up to 8 T. We find a decrease in scattering rates relative to the zero field behavior. The four wave mixing signal shows a strong enhancement at the lowest Landau level which we attribute to the Fermi edge singularity.