BEST PAPER AWARD: Equivalent Circuit Model for the Switching conduction Characteristics of TiO2 based MIM structures

J.BLASCO; N.GHENZI; LEVY PABLO; J.SUÑÉ; E. MIRANDA

Belgrado

Workshop; 29th International Conference on Microelectronics; 2014

IEEE SSCS

A compact model for the conduction characteristics of TiO2-based resistive switches based on the generalized diode equation is reported. The proposed equivalent electrical circuit consists in two antiparallel diodes with series and parallel resistances representing the filamentary current pathway across the oxide layer and the possible parasitic conduction effects. The model accounts for the pulse-induced hysteretic behavior exhibited by the I-V characteristic after electroforming. Three different approaches, each one of them with increased complexity, are assessed: constant, nanowire-like and sigmoidal diode amplitude. In all the cases, the logarithmic conductance of the diodes is modeled using a logistic-type equation.