INTERLAYER MAGNETIC COUPLING AND THE QUANTUM HALL-EFFECT IN MULTILAYER ELECTRON-SYSTEMS

Authors
Citation
L. Brey, INTERLAYER MAGNETIC COUPLING AND THE QUANTUM HALL-EFFECT IN MULTILAYER ELECTRON-SYSTEMS, Physical review letters, 81(21), 1998, pp. 4692-4695
Citations number
26
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
81
Issue
21
Year of publication
1998
Pages
4692 - 4695
Database
ISI
SICI code
0031-9007(1998)81:21<4692:IMCATQ>2.0.ZU;2-M
Abstract
We study the effect that electron-electron interaction has on the prop erties of a multilayer electron system. We consider the case correspon ding to filling factor unity in each layer and find that, as a functio n of the sample parameters, the system has ferromagnetic, canted antif erromagnetic, or paramagnetic interlayer spin correlations. These thre e ground states are QHE phases because of the existence of a finite ac tivation energy. In the ferromagnetic phase the gap is due to the intr awell exchange energy, whereas in the paramagnetic phase the gap appea rs due to spatial modulation of the interwell coherence. [S0031-9007(9 8)07800-4].