Electron-confined LO-phonon scattering in GaAs-Al0.45Ga0.55As superlattice

Pramana

D Abouelaoualim1¹ 

[1] L.P.S.C.M., Physics Department, Faculty of Sciences-Semlalia, BP:2390, 40000, Marrakech, Morocco$$

关键词: Confined LO-phonon;    scattering;    superlattice;    miniband;    relaxation time.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We develop a theoretical model to the scattering time due to the electron-confined LO-phonon in GaAs-Al𝑥Ga1-𝑥As superlattice taking into account the sub-band parabolicity. Using the new analytic wave function of electron miniband conduction of superlattice and a reformulation slab model for the confined LO-phonon modes, an expression for the electron-confined LO-phonon scattering time is obtained. In solving numerically a partial differential equation for the phonon generation rate, our results show that for 𝑥 = 0.45, the LO-phonon in superlattice changes from a bulk-like propagating mode to a confined mode. The dispersion of the relaxation time due to the emission of confined LO-phonons depends strongly on the total energy.

【 授权许可】

Unknown