Exploration the quantum and transport lifetimes of electron gas in partially alloyed AlGaAs quantum well

• Transport and quantum electron lifetimes explored in dilute alloyed AlxGa1−xAs 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.

Low temperature transport and quantum lifetimes (τT,τQτT,τQ) of two dimensional electron gas (2DEG) confined in the partially alloyed AlxGa1−xAs (with 0 < x < 0.01) quantum well have been explored. Scattering angle θθ, 2DEG density nsns, 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.