4-WAVE-MIXING IN MODULATION-DOPED GAAS QUANTUM-WELLS UNDER STRONG MAGNETIC-FIELDS

Authors
BARJOSEPH I FINKELSTEIN G BARAD S SHTRIKMAN H LEVINSON Y
Citation
I. Barjoseph et al., 4-WAVE-MIXING IN MODULATION-DOPED GAAS QUANTUM-WELLS UNDER STRONG MAGNETIC-FIELDS, Physica status solidi. b, Basic research, 188(1), 1995, pp. 457-463
Citations number
11
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
188
Issue
1
Year of publication
1995
Pages
457 - 463
Database
ISI
SICI code
0370-1972(1995)188:1<457:4IMGQU>2.0.ZU;2-O
Abstract
Time-resolved four-wave mixing is used to study electron scattering in modulation-doped GaAs quantum wells in high magnetic fields up to 8 T . A strong increase in dephasing times in strong magnetic fields is ob served and attributed to a decrease in the scattering rates relative t o zero field. An early time signal in high magnetic field is found, wh ich is due to a polarization interaction process. A strong enhancement of the signal at the absorption edge is measured which is attributed to the Fermi edge singularity.