Program

O.7 -- Oral, NCTP-40

Date: Tuesday, 28 July 2015

Time: 11h00 - 11h20

Influence of an electromagnetic wave on the Hall effect in two-dimensional semiconductor systems

Nguyen Quang Bau(a,*), Nguyen Dinh Nam(a), Bui Dinh Hoi(b)

(a) Faculty of Physics, Hanoi University of Science, Vietnam National University, Hanoi, Vietnam (b) Department of Physics, National University of Civil Engineering, Hanoi, Vietnam

The Hall effect in some two-dimensional semiconductor systems under the influence of an electromagnetic wave (EMW), is theoretically studied using the quantum kinetic equation for electrons. The magnetic field is applied perpendicularly to the plane of free motion of electrons. The magnetoresistance and conductivity are calculated in parabolic quantum wells, square quantum wells and compositional superlattices taking account the electron – phonon interaction. For the electron – acoustic phonon interaction at low temperature, numerical results for the magnetoresistance are in good agreement with available experimental data. For the electron – optical phonon interaction at high temperature, the magneto-phonon resonance effect is observed in the case of absence of the EMW and optically detected magneto-phonon resonance effect is observed in the case of presence of EMW.

Presenter: Nguyen Quang Bau