The Dependence of the Magnetoresistance in Quantum Wells with Parabolic Potential on Some Quantities under the Influence of Electromagnetic Wave

2014 ◽  
Vol 155 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Nguyen Dinh Nam ◽  
Do Tuan Long ◽  
Nguyen Vu Nhan
Keyword(s):  
Electromagnetic Wave ◽  
Quantum Wells ◽  
Parabolic Potential

The influences of parabolic potential and magnetism on strongly coupled polaron characteristics within asymmetric Gaussian quantum wells

2021 ◽  
Author(s):  
Saren Gaowa ◽  
Yan-Bo Geng ◽  
Zhao-Hua Ding ◽  
Jing-Lin Xiao
Keyword(s):  
Magnetic Field ◽  
Quantum Wells ◽  
Barrier Height ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Cyclotron Frequency ◽  
Strongly Coupled ◽  
Parabolic Potential ◽  
Do So

In this research, the effects of magnetism and parabolic potential on strongly coupled polaron characteristics within asymmetric Gaussian quantum wells (AGQWs) were investigated. To do so, the following six parameters were studied, temperature, AGQW barrier height, Gaussian confinement potential (GCP) width, confinement strengths along the directions of [Formula: see text] and [Formula: see text], as well as magnetic field cyclotron frequency. The relationships among frequency oscillation, AGQW parameters and polaron ground state energy in RbCl crystal were studied based on linear combination operator and Lee–Low–Pines unitary transformation. It was concluded that ground state energy absolute value was decreased by increasing GCP width and temperature, and increased with the increase of confinement strength along [Formula: see text] and [Formula: see text] directions, cyclotron frequency of magnetic field and barrier height of AGQW. It was also found that vibrational frequency was increased by enhancing confinement strengths along the directions of [Formula: see text] and [Formula: see text], magnetic field cyclotron frequencies, barrier height AGQW and temperature and decreased with the increase of GCP width.

Effect of the anisotropic parabolic potential on the polaron’s properties in asymmetric Gaussian quantum wells

2021 ◽  
Vol 15 (01) ◽  
Author(s):  
Yan-Bo Geng ◽  
Zhao-Hua Ding ◽  
Ying Zhao ◽  
Yong Sun ◽  
Jing-Lin Xiao
Keyword(s):  
Quantum Wells ◽  
Parabolic Potential

The effect of parabolic potential on ground state energy and vibration frequency of magnetopolaron in asymmetric Gaussian potential quantum wells

2021 ◽  
Author(s):  
Jing-Hong Mei ◽  
Jing-Lin Xiao ◽  
Yong Sun ◽  
Bin Zhang ◽  
Xiu-Juan Miao ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Semiconductor Lasers ◽  
Vibration Frequency ◽  
Ground State ◽  
State Energy ◽  
Transformation Method ◽  
Gaussian Potential ◽  
Parabolic Potential ◽  
Potential Applications ◽  
Energy Formula

Anisotropy parabolic potential (APP) effects on ground state (GS) energy [Formula: see text] and the vibration frequency (VF) [Formula: see text] of weak-coupled magnetopolaron (MP) in asymmetric Gaussian quantum wells (AGQWs) were investigated using the linear combination operator and unitary transformation method. The obtained results showed that [Formula: see text] and [Formula: see text] were increased by increasing the barrier height [Formula: see text] of AGQWs as well as transverse and longitudinal confined strengths [Formula: see text] and [Formula: see text] of APP and decreased with increase in the asymmetric Gaussian confinement potential (AGCP) range [Formula: see text] and transverse and longitudinal effective confined lengths [Formula: see text] and [Formula: see text] of APP. Thus, the GS energy and VF of MP could be changed by adjusting the confinement parameters of the APP and AGCP. The study of quantum wells’ semiconductor materials has broad potential applications in semiconductor lasers, optoelectronic devices and quantum information.

scholarly journals Magneto – thermoelectric effects in quantum well in the presence of electromagnetic wave

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Nguyen Quang Bau ◽  
Dao Thu Hang ◽  
Doan Minh Quang ◽  
Nguyen Thi Thanh Nhan
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Quantum Well ◽  
Quantum Kinetic Equation ◽  
Thermoelectric Effects ◽  
Parabolic Potential ◽  
Bulk Semiconductors ◽  
Sdh Oscillations ◽  
Analytic Expression ◽  
The Magnetic Field

Abstract. We have studied magneto-thermoelectric effects in quantum well in the presence of electromagnetic wave. The analytic expression for Ettingshausen coefficient (EC) in the Quantum Well with parabolic potential (QWPP) in the presence of Electromagnetic wave (EMW) is calculated by using the quantum kinetic equation for electrons. The dependence of EC on the frequency, the amplitude of EMW, the Quantum Well parameters and the temperature are obtained. The results are numerically calculated, plotted, and discussed for GaAs/GaAsAl Quantum Well to clearly show the dependence of EC on above parameters and the results in this case are compared with the case in the bulk semiconductors. We realize that as the temperature increases, the EC decreases. The results show appearance of the Shubnikov–de Haas (SdH) oscillations when we survey the dependence of EC on the magnetic field.  Keywords:  Ettingshausen, Quantum well, Electromagnetic wave, parabolic potential, GaAs/GaAsAl.

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