We demonstrate the existence of oscillations in the magnetic peak posi
tions of Stark-Cyclotron Resonances due to acoustic phonon scattering
in confined superlattices and investigate the oscillations of level br
oadening in the Wannier-Stark localization regime as a function of the
magnetic field due to acoustic phonons. Manifestation of these effect
s in recent experiments is discussed. (C) 1998 Published by Elsevier S
cience Ltd.