Programme

P.14 -- Poster, VCTP-45

Date: Tuesday, 13 October 2020

Time: 08:30 - 10:00

The influence of confined acoustic phonon on the quantum Ettingshausen effect in cylindrical quantum wire with a infinite potential in presence of Strong electromagnetic Wave

Hoang Van Ngoc (1), Nguyen Thi Nguyet Anh (2), Tang Thi Dien (2), Nguyen Quang Bau ( 2), Nguyen Vu Nhan ( 3)

(1) Thu Dau Mot University, 06 Tran Van on, Phu Hoa Thu Dau Mot, Binh Duong,Viet Nam (2) VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi, Viet Nam (3) Ha Noi Metropolian University ,98 Duong Quang Ham, Quan Hoa, Cau Giay, Ha Noi, Viet Nam

Based on the kinetic equation method, the quantum Ettingshausen effect has been theoretically studied under the influence of confined acoustic phonon in cylindrical quantum wire with a infinite potential in presence of strong electromagnetic wave. We considered a quantum wire in the presence of constant electric field, magnetic field and electromagnetic wave (EMW) with assumption that electron – confined acoustic phonon (AP) scattering is essential. The EC obtained depends on many quantities in acomplicated way such as temperature, magnetic field, frequency and amplitude of EMW, Cycloton frequency, radius of cylindrical quantum wireand quantum numbers which specify confined AP. In detailed consideration,the quantum number m1, m2 were changed in order to characterize the influence of confined acoustic phonon.When setting the m1, m2 to zero, we obtained the results that corresponded to the case of unconfined phonons. The theoretical results have been numerically evaluated and discussed for the GaAs/GaAsAl quantum wire (CQW). The results show that phonon confinement has changed both the qualitative and quantitative Ettingshausen coefficients. The magnitude of the Ettingshausen coefficent increased many times, the position of the peak magnetic resonance changes and the peak number of magnetic resonances increases due to the size reduction effect. These resultsare new and different from bulk semiconductor and unconfined phonon.These findings have perfectly contributed to the theory of the Ettingshausen effect in low-dimensional semiconductor systems.

Presenter: Nguyễn Thị Nguyệt Ánh

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