2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26858A current-controlled negative differential resistance has been revealed in the I-V characteristics of single crystal La$_{2}$CuO$_{4+δ}$ in the low temperature region. The non-linear behavior of conductivity is accompanied by a transition from positive to negative magnetoresistance when the current is growing. Possible reasons for the effect observed are discussed.3pages, a translation from Russian into English of paper published in Izvestiya RAN, Ser. FizSuperconductivityMaterials Sciencetext