Title :
Magnetoluminescence measurement of Zeeman and exchange interactions of excitons in GaAs/AlGaAs multiple quantum wells
Author :
Leem, Y.A. ; Ko, H.S. ; Kim, W.S. ; Kim, Y.S. ; Kim, D.H. ; Schmiedel, T. ; Yun, C.E. ; Pyo, H.M. ; Woo, J.C.
Author_Institution :
Dept. of Phys., Seoul Nat. Univ., South Korea
Abstract :
The Zeeman splitting and diamagnetic shift of heavy-hole exciton in GaAs/Al0.25Ga0.25As multi-quantum wells (MQW) were investigated for various barrier widths by magnetoluminescence up to 30 T at 4.2 K. It is obtained that the diamagnetic shift is independent to the barrier width (LB), but the effective g-factor becomes smaller as LB decreases for a fixed QW width. Also reported is the fine splitting due to the exchange interaction for LB⩽50 Å
Keywords :
III-V semiconductors; Zeeman effect; aluminium compounds; exchange interactions (electron); excitons; gallium arsenide; magneto-optical effects; photoluminescence; semiconductor quantum wells; GaAs-AlGaAs; GaAs/Al0.25Ga0.25As; GaAs/AlGaAs multiple quantum wells; Zeeman interactions; diamagnetic shift; effective g-factor; exchange interactions; excitons; fine splitting; magnetoluminescence; magnetoluminescence measurement; Couplings; Elementary particle exchange interactions; Excitons; Gallium arsenide; Laboratories; Magnetic field measurement; Magnetic separation; Physics; Quantum well devices; Telecommunications;
Conference_Titel :
Compound Semiconductors, 1997 IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7503-0556-8
DOI :
10.1109/ISCS.1998.711613
