Donor binding energy and thermally activated persistent photoconductivity in high mobility (001) AlAs quantum wells
Donor binding energy and thermally activated persistent photoconductivity in high mobility (001) AlAs quantum wells
A doping series of AlAs (001) quantum wells with Si δ-modulation doping on both sides reveals different dark and postillumination saturation densities, as well as temperature dependent photoconductivity. The lower dark two-dimensional electron density saturation is explained assuming deep binding energy of ΔDK=65.2meV for Si donors in the dark. Persistent …