Persistent photoconductivity in hydrostatically compressed, selectively doped n-AIxGa1-xAs/GaAs structures
Voronovskii A. N., Itskevich I. E., Kashirskaya L. M., Kulakovskii V. D., Medvedev B. K., Mokerov V. G.
A qualitative change in the nature of the persistent photoconductivity of n-A\XG&X __x As/GaAs structures has been detected during hydrostatic compression. At high values of Ρ ( > 8 kbar), the persistent photoconductivity disappears in the bulk Al^ Gaj x As layer, but it continues to be observed in the adjacent two-dimensional channel in the GaAs. The reason for the disappearance of the persistent photoconductivity from the A\x _ x As is the descent of L or X valleys below the bottom of the Γ minimum.