Programme

P.19 -- Poster, VCTP-46

Date: Tuesday, 5 October 2021

Time: 08:30 - 10:00

The resonance of the quantum Peltier coefficient in a parabolic quantum well of GaAs/GaAsAl in the case of confined optical phonon

Cao Thị Vi Ba (1), Nguyễn Thị Lâm Quỳnh (1), Nguyễn Quang Báu (1), Nguyễn Bá Đức (2)

(1) VNU University of Science (2) Tan Trao University

The resonance of the quantum Peltier coefficient (qPC) in a parabolic quantum well (PQW) of GaAs/GaAsAl, subjected in a dc electric field, a magnetic field and a laser radiation, has been theoretically studied by using the kinetic equation method with the assumption that the confined electron-confined optical phonon scattering is essential. The obtained analytical expression for the qPC in PQW is as a function of external fields, PQW parameters, and especially the quantum number m which was changed in order to characterize the influence of confined acoustic phonon. When m is set to zero, we obtained the results that corresponded to the case of unconfined acoustic phonon. Numerical calculations are also achieved for a PQW of GaAs/GaAsAl. The obtained results show that the qPC reaches resonance peaks when investigating its dependence on magnetic field and on frequency of laser radiation. Due to the influence of confined optical phonon, the position of resonance peaks has been not only shifted but also more pronounced than in the case of unconfined optical phonon. Besides, as the amplitude of laser radiation increases, these resonance peaks become higher.

Presenter: Nguyễn Thị Lâm Quỳnh