Observation of a magnetic-field-induced transition in the behavior of extremely shallow quantum well excitons

被引:22
作者
Fritze, M
Perakis, IE
Getter, A
Knox, W
Goossen, KW
Cunningham, JE
Jackson, SA
机构
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
[2] RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08855
关键词
D O I
10.1103/PhysRevLett.76.106
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Using magnetoabsorption and electroabsorption techniques, we stud excitons with binding energy comparable to the depth of GaAs/AlGaAs quantum wells. In-plane magnetic fields decrease the exciton linewidth considerably. Without magnetic fields, electroabsorption reveals 3D-like exciton behavior. This broadening persists with magnetic fields along the growth direction, but changes to a redshift for in-plane magnetic fields, reminiscent of 2D-like excitons. We discuss how in-plane magnetic fields change the nature of the exciton by inducing a two-body velocity-dependent interaction.
引用
收藏
页码:106 / 109
页数:4
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