Coexistence of nearly free and strongly bound trions from magneto-photoluminescence of two-dimensional quantum structures with tunable electron or hole concentration

被引：0
|
作者：
Jadczak, J. [1 ]
Bryja, L. [1 ]
Misiewicz, J. [1 ]
Wojs, A. [1 ]
Potemski, M.
Liu, F.
Yakovlev, D. R. [2 ]
Bayer, M. [2 ]
Reuter, D. [3 ]
Wieck, A. [3 ]
Nicoll, C. A. [4 ]
Farrer, I. [4 ]
Ritchie, D. A. [4 ]
机构：
[1] Wroclaw Univ Technol, Inst Phys, Wyb Wyspianskiego 27, PL-50370 Wroclaw, Poland
[2] CNRS, Grenoble High Magnetic Field Lab, F-38042 Grenoble, France
[3] Tech Univ Dortmund, D-44227 Dortmund, Germany
[4] Ruhr Univ Bochum, Lehrstuhl Angewandte Festkorperphysik, Bochum, Germany
来源：
PHYSICS OF SEMICONDUCTORS | 2013年 / 1566卷
关键词：
Photoluminescence; two dimensional hole gas;
D O I：
10.1063/1.4848509
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report on polarization-resolved photoluminescence studies of diverse excitonic complexes formed in GaAs quantum wells with a high-mobility two-dimensional hole gas in magnetic fields up to 23 T. Using two-beam illumination we decrease the hole concentration beyond the point of conversion from p-to n-type structures. We have demonstrated charge conversion between positive and negative exciton complexes (both free and bound to acceptors in the well). The switch between the electron and hole gases allowed us to distinguish between the emission lines from positive trions moving almost freely in the quantum well and bound to ionized acceptors in the barrier, which indicate their coexistence in the same well.
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收藏
页码：510 / +
页数：2
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