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

页码：342 / 347

页数：6

共 42 条

[11] NONPARABOLICITY EFFECTS IN A QUANTUM WELL - SUBLEVEL SHIFT, PARALLEL MASS, AND LANDAU-LEVELS [J].