Programme

P.43 -- Posters, VCTP-50

Date: Tuesday, 5 August 2025

Time: 08:30 - 10:00

The Hall Effect in an infinite Semi-parabolic Plus Semi-inverse Squared Quantum wells in the presence of a Strong Electromagnetic Wave.

Nguyen Thu Huong (1), Nguyen Dinh Nam (2), Nguyen Thi Thanh Nhan (2), Bui Thi Dung (2), Vu Tuyet Mai (2), Nguyen Quang Bau (2).

(1) Academy of Air Defence and Air Force, Kim Son, Son Tay, Ha Noi, Viet Nam. (2) Department of Theoretical Physics, Faculty of Physics, VNU University of Science, No. 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam.

The Hall Effects (HE) in an infinite Semi-parabolic Plus Semi-inverse Squared Quantum wells (ISPPSISQW) in the presence of a strong Electromagnetic Wave (EMW) is theoretically investigated by using Quantum Kinetic Equation. The system is subjected to a strong EMW E(t)=(E_0 sinΩt)e_y, a magnetic field B=Be_z, and a cross-DC electric field E=Ee_x. The electron-optical phonon scattering is considered. The general expression of the Hall coefficient is presented as a function of the temperature, the external magnetic field, the photon energy, and the intensity of the strong EMW as well as characteristic parameters of ISPPSISQW. The theoretical result for a specific GaAs/GaAsAl ISPPSISQW is achieved by using the numerical method. The computational results demonstrate that the maximum peaks appear to satisfy the magneto-phonon-photon resonance condition. Regarding the dependence of the Hall Coefficient on the magnetic field B: when the temperature changes, the position of the resonance peak remains unaffected by temperature variations; and when the confinement frequency increases, the magnitude of the Hall coefficient peak increases, and the position of the peak shifts towards the smaller magnetic field B. For the dependence of the Hall Coefficient on the electromagnetic wave frequency: when the temperature changes, the peak decreases, but the position of the peak does not change; and when increasing confinement frequency, the magnitude of the peak increases; and when the external magnetic field B increases, the magnitude of the Hall coefficient increases and the peak position shifts towards the higher frequencies.

Presenter: Bui Thi Dung