| Issue |
Europhys. Lett.
Volume 40, Number 5, December I 1997
|
|
|---|---|---|
| Page(s) | 557 - 562 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00505-4 | |
| Published online | 01 September 2002 | |
Narrow-resonance states of 2D magnetic spin-exciton in periodically modulated fields
1
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
Received:
5
May
1997
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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