2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/20849In this paper we discuss some general concepts regarding the recent experiments of Mani et al and Zudov et al regarding the appearance of large resistance variations in the presence of a rf field. The possibility of negative resistance is also discussed.5 pages, pdf fileMesoscale and Nanoscale Physicstext