Exploration the quantum and transport lifetimes of electron gas in partially alloyed AlGaAs quantum well. (July 2015)

• Record Type: Journal Article
• Authors: Rahmani, Amir; Sadeghzadeh, Mohammad Ali; Khordad, Reza
• Is Part Of: Superlattices and microstructures. Volume 83(2015)
• Page Start: 271
• Page End: 281
• Publication Date: 2015-07
• Subjects: Semiconductor nanostructures -- AlGaAs quantum well -- Electronic lifetimes -- Dilute alloyed -- Alloy scattering -- Scattering angle; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2015.03.037
• Languages: English
• ISSNs: 0749-6036

Abstract

Highlights: Transport and quantum electron lifetimes explored in dilute alloyed Al x Ga1− x As quantum well. It is explained how electron lifetimes depend on short and long range scattering potentials. How electrons are scattered from alloy disorders, background and remote charged impurities. Electron lifetimes were calculated in terms of electron gas density and Al alloy content x . Abstract: Low temperature transport and quantum lifetimes ( τ T, τ Q ) of two dimensional electron gas (2DEG) confined in the partially alloyed Al x Ga1 − x As (with 0 < x < 0.01) quantum well have been explored. Scattering angle θ, 2DEG density n s, and alloy content x dependence of electron lifetimes due to screened short range (alloy disorder) and long range Coulomb interaction (remote and background charged impurities) scattering mechanisms have been evaluated. We explain how different components limit the total transport and quantum electron lifetimes. Finally, the theoretical lifetimes versus alloy content x has been exemplified with experimental results.