Volume 40, Number 5, December I 1997
|Page(s)||557 - 562|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Narrow-resonance states of 2D magnetic spin-exciton in periodically modulated fields
L. D. Landau Institute for Theoretical Physics,
Kosygina 2, Moscow, Russia
2 High Magnetic Field Laboratory (The Grenoble High Magnetic Field Laboratory is "Laboratoire conventionné à l'Université Joseph-Fourier de Grenoble".) , Max-Planck-Institut für Festkörperforschung, Centre National de la Recherche Scientifique, BP 166, F-38042 Grenoble, Cedex 9, France
3 Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
4 Solid State Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel
Accepted: 17 October 1997
Two-dimensional electron gas (2DEG) under a strong perpendicular magnetic field in periodically modulated fields exhibits a peculiar discrete spectrum near the bottom of the spin-exciton band. The combined effect of the electrostatic modulation potential, and the e-h Coulomb attraction under the magnetic field, leads to nearly bound relative e-h oscillations perpendicular to the modulation axis, which have a characteristic Rydberg-like spectrum near the edge of the spin-exciton band. This low-lying, very narrow excitonic lines may significantly affect the spin and the charge transport in the thermally activated regime.
PACS: 73.50.Jt – Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects) / 71.35.-y – Excitons and related phenomena / 76.60.-k – Nuclear magnetic resonance and relaxation
© EDP Sciences, 1997
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