We propose a model of the kinetics of reversible breakdown in metal-insulator-metal structures with afnia based on the growth of fractal patterns of defects when the insulator is subject to an external voltage. The probability that a defect is (or is not) generated and the position where it is generated depend on the electric field distribution. The new defect moves accordingly to fractal rules and attach to another defect in a tree branch. When the two electrodes sandwiching the insulating film are connected a conductive filament is formed and the breakdown takes place. The model is calibrated with experiments inducing metastable soft breakdown events in Pt/HfO2/Pt capacitors.

Model of reversible breakdown in HfO2 based on fractal patterns / Lorenzi, Paolo; Rao, Rosario; Romano, Giulio; Irrera, Fernanda. - In: ADVANCES IN CONDENSED MATTER PHYSICS. - ISSN 1687-8108. - STAMPA. - 2015:(2015), pp. 1-8. [10.1155/2015/136938]

Model of reversible breakdown in HfO2 based on fractal patterns

LORENZI, PAOLO;RAO, ROSARIO;ROMANO, GIULIO;IRRERA, Fernanda
2015

Abstract

We propose a model of the kinetics of reversible breakdown in metal-insulator-metal structures with afnia based on the growth of fractal patterns of defects when the insulator is subject to an external voltage. The probability that a defect is (or is not) generated and the position where it is generated depend on the electric field distribution. The new defect moves accordingly to fractal rules and attach to another defect in a tree branch. When the two electrodes sandwiching the insulating film are connected a conductive filament is formed and the breakdown takes place. The model is calibrated with experiments inducing metastable soft breakdown events in Pt/HfO2/Pt capacitors.
2015
condensed; matter; physics
01 Pubblicazione su rivista::01a Articolo in rivista
Model of reversible breakdown in HfO2 based on fractal patterns / Lorenzi, Paolo; Rao, Rosario; Romano, Giulio; Irrera, Fernanda. - In: ADVANCES IN CONDENSED MATTER PHYSICS. - ISSN 1687-8108. - STAMPA. - 2015:(2015), pp. 1-8. [10.1155/2015/136938]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/846938
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