Ballistic electron transport through epitaxial GaAs films in a magnetically induced surface photocurrent
Al'perovich V. L. , Minaev A. O., Terekhov A. S.
A nonmonotonic dependence of the magnetically induced surface photocurrent on the magnetic field has been observed. This behavior is evidence of a transport of ballistic photoelectrons through a thick (d ~ \0μτη) epitaxial film of w-type GaAs and of a scattering of these electrons at the interface with the substrate. The diffuseness coefficient of the scattering of 30-meV electrons by the free surface of the epitaxial film is Px —0.2, and that of the scattering by the film-substrate interface is P7 ~0.7.