The Ettingshausen coefficient in quantum wells under influence of laser radiation in the case of electron-optical phonon interaction

Abstract

Abstract-By using a quantum kinetic equation for electrons interacting with an optical phonon, an analytic expression is obtained for the Ettingshausen coefficient (EC) in quantum wells with parabolic potential (QWPP) under the influence of laser radiation. The dependence of EC on frequency, amplitude of laser radiation, quantum wells parameters and temperature gradient is studied. The theoretical results are numerically calculated, plotted and discussed for GaAs/GaAsAl quantum well. Especially, when we study the dependence of EC on temperature, we realize that the EC in QWPP is 10 2 times bigger than that in bulk semiconductors.

Conductivity Tensor in Cylindrical Quantum Wire with Parabolic Potential for the Case of Electron-Acoustic Phonon Scattering

“…Parameters used to plot the figures [1,2] Figure 1 shows the dependence of the conductivity tensor on the laser field frequency when this frequency < 10 9 . We see that as frequency increases the conductivity tensor decreases, at a frequency range less than 3*10 9 conductivity tensors decrease very rapidly as frequency increases.…”

“…That is thanks to scientists discovering new effects, and one of that is the study of nanotechnology. As the size of the material decreases, the physical properties also change [1][2][3][4][5]. There are many studies on low-dimensional semiconductors, which focus on the effects and properties of quantum well [1][2][3][4][5][6], quantum wire [7][8][9][10][11], quantum dot, or superlattice [12][13][14][15].…”

“…As the size of the material decreases, the physical properties also change [1][2][3][4][5]. There are many studies on low-dimensional semiconductors, which focus on the effects and properties of quantum well [1][2][3][4][5][6], quantum wire [7][8][9][10][11], quantum dot, or superlattice [12][13][14][15]. Thanks to the presence of the external field, many new effects have been discovered and studied [2,5,7,16].…”

“…There are many studies on low-dimensional semiconductors, which focus on the effects and properties of quantum well [1][2][3][4][5][6], quantum wire [7][8][9][10][11], quantum dot, or superlattice [12][13][14][15]. Thanks to the presence of the external field, many new effects have been discovered and studied [2,5,7,16]. Quantum wire is a material with a radius of nanometer size, in which electrons move freely along an axis and are confined in a plane.…”

Effect of Confined Optical Phonons on Photo-Stimulated Ettingshausen Effect in Rectangular Quantum Wires with A Perpendicular Magnetic Field

“…In two -dimensional semiconductor system (2DSS), the EC is two order in magnitude larger than the one of the bulk semiconductors when considering the temperature dependence of EC, which is achieved in the parabolic quantum well of GaAs/AlGaAs [5]. In compositional superlattice, the Shubnikovde Haas oscillations haves been appearing when examining the dependence of the quantum EC on the magnetic field (for electrons-acoustic phonons scattering) [6].…”