Programme

P.5 -- Poster, NCTP-39

Date: Tuesday, 29-07-2014

Time: 10h30 - 12h00

Influence of a Strong Electromagnetic Wave ( Laser Radiation) on the Hall Effect in a Cylindrical Quantum Wires with Infinitely High Potential

Nguyen Thu Huong(1), Nguyen Quang Bau(2), Nguyen Duc Luong(2)

(1) Academy of Air Defense and Air Force , Son Tay, Hanoi, Vietnam (2)Faculty of Physics, Hanoi University of Science, Vietnam National University 334-Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam

Based on the quantum kinetic equation for electrons, we theoretically study the influence of a Strong Electromagnetic Wave (EMW) on the Hall effect in a cylindrical quantum wire with infinitely high potential ${\rm{V }}(\overrightarrow r ){\rm{ }} = {\rm{ }}0$ inside the wire and ${\rm{V }}(\overrightarrow r ){\rm{ }} = {\rm{ }}\infty $ elsewhere subjected to a crossed dc electric field ${\vec E_1} = (0,0,{E_1})$ and magnetic field $\vec B = (0,B,0)$ in the presence of a strong EMW (laser radiation) characterized by electric field $\vec E = (0,0,{E_0}\sin \Omega t)$ (where ${E_0}$ and $\Omega$ are amplitude and frequency of EMW, respectively). We obtain the analytic expressions for the components ${\sigma _{zz}}$ and ${\sigma _{xz}}$ of Hall conductivity as well as Hall coefficient with the dependence on B, $\Omega$, temperature T of system and the radius r (m), the length L(m) characteristic parameters of Cylindrical quantum wire. The results are numerically evaluated and graphed for GaAs/GaAsAl quantum wire to show clearly the dependence of Hall conductivity and Hall coefficient on above parameters.

Presenter: Nguyen Thu Huong