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<< JRScience Home     Volume 17 No.2   April  2006     << Back to Volume Home

NON-PARABOLICITY EFFECTS ON ELECTRON-CONFINED LO-PHONON SCATTERING RATES IN Ga As - Al0.45 Ga0.55 As SUPERLATTICE 

D. Abouelaoualim

L.P.S.C.M, Physic Department, Faculty of Sciences- Semlalia,

BP:2390, 40000, Marrakech, Morocco.

Email: abouelaoualim_d@hotmail.com  

Abstract:

We investigate theoretically the effect of non-parabolic band structure on the electron-confined LO-phonon scattering rate in GaAs-Al0.45Ga0.55As superlattice using the quantum treatment, the new wave function of electron miniband conduction of superlattice and a reformulation slab model for the confined LO-phonon modes. An expression for the scattering rates is obtained. Our results show that for transitions due to the emission of confined LO-phonon the scattering rates significantly increase for non-parabolicity case.

Keywords: Confined LO-phonon, miniband, non-parabolicity, scattering rate, superlattice.