HIGH-FIELD SPIN-POLARIZATION TRANSITION IN THE LANDAU BANDS OF QUASI-2D ELECTRON GASES WITH STRONG LATERAL MODULATION

Authors
PETIT F SFAXI L LELARGE F CAVANNA A HAYNE M ETIENNE B
Citation
F. Petit et al., HIGH-FIELD SPIN-POLARIZATION TRANSITION IN THE LANDAU BANDS OF QUASI-2D ELECTRON GASES WITH STRONG LATERAL MODULATION, Europhysics letters, 38(3), 1997, pp. 225-230
Citations number
29
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
38
Issue
3
Year of publication
1997
Pages
225 - 230
Database
ISI
SICI code
0295-5075(1997)38:3<225:HSTITL>2.0.ZU;2-Y
Abstract
2D electron gases, imbedded in a 1D lateral potential (in AlxGa1-xAs), made by a periodic modulation in alloy composition, are obtained by o rganized epitaxy on vicinal surfaces. The exchange enhancement of the Landau level spin splitting is inhibited up to a strong magnetic field (similar to 6T here). Low-temperature magneto-transport data revealin g this effect cannot be explained by disorder but are fully consistent with the large potential gradients associated with the modulation amp litude.