2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107113Recently discovered new structures and zero-resistance states outside the well-known oscillations are demonstrated to arise from multiphoton assisted processes, by a detailed analysis of microwave photoresistance in two-dimensional electron systems under enhanced radiation. The concomitant resistance dropping and peak narrowing observed in the experiments are also reproduced. We show that the radiation-induced suppression of average resistance comes from virtual photon effect and exists throughout the whole magnetic field range.4 pages, 2 figures, published versionMesoscale and Nanoscale Physicstext