2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19775Common models describing magnetotransport properties of periodically modulated two--dimensional systems often either directly start from a semiclassical approach or give results well conceivable within the semiclassical framework. Recently, magnetoresistance oscillations have been found on samples with strong unilateral modulation and short period (d=15 nm) which cannot be explained on a semiclassical level (magnetic breakdown). We use a simple fully quantum mechanical model which gives us both magnetoresistance data nicely comparing to the experiments and a good intuitive insight into the effects taking place in the system.7 pages, 5 figures, LaTeX, iopart, in proceedings of the 26th ICPSMesoscale and Nanoscale Physicstext