A parallel magnetic field driven confinement versus separation of charges in GaAs quantum well investigated by magneto-photovoltage and magneto-photoluminescence spectroscopy

被引：4
作者：
Haldar, S. [1 ,2 ]
Banerjee, A. [3 ]
Vashisht, Geetanjali [1 ,2 ]
Porwal, S. [1 ]
Sharma, T. K. [1 ,2 ]
Dixit, V. K. [1 ,2 ]
机构：
[1] Raja Ramanna Ctr Adv Technol, Mat Sci Div, Semicond Mat Lab, Indore 452013, Madhya Pradesh, India
[2] Homi Bhabha Natl Inst, Training Sch Complex, Bombay 400094, Maharashtra, India
[3] UGC DAE Consortium Sci Res, Indore 452017, Madhya Pradesh, India
来源：
JOURNAL OF LUMINESCENCE | 2019年 / 206卷
关键词：
Magneto-excitons; Photoluminescence; Quantum-well; Charge separation; OPTICAL-PROPERTIES; HEAVY-HOLE; EXCITONS; MASS;
D O I：
10.1016/j.jlumin.2018.10.076
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Opto-electronic properties of excitons under parallel and perpendicular magnetic field are investigated on various thickness of GaAs/AlGaAs quantum well. An analytical expression of diamagnetic energy under a parallel magnetic field is derived by solving the Schrodinger equation of exciton in quantum wells. The transformation underlying the solution of Schrodinger equation suggests that an in-plane separation between electron and hole may increase with an increasing parallel magnetic field, leading to a reduced coulomb interaction and slow radiative recombination rate. As a consequence of this, even in the absence of an external electrical bias, parallel magnetic field induces a chiral charge transportation across the hetero-interfaces of a quantum well, which gives rise to an increasing in-plane magneto-photovoltage signal. The present investigation provides a unique method to control the recombination and transportation of charges by the strength and orientation of a magnetic field.
引用
收藏
页码：342 / 347
页数：6
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