Tailoring conductive filaments by electroforming polarity in memristive based TiO2 junctions

We probe the resistive switching response of Au/TiO2/Cu junctions, on samples initialized using both polarities electroforming. A conductive path is formed in both cases: a copper metallic filament for negative electroforming and a titanium dioxide possibly Magneli phase based filament for the posit...

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Detalles Bibliográficos
Autores principales: Ghenzi, N., Sánchez, M.J., Rubi, D., Rozenberg, M.J., Urdaniz, C., Weissman, M., Levy, P.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00036951_v104_n18_p_Ghenzi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:We probe the resistive switching response of Au/TiO2/Cu junctions, on samples initialized using both polarities electroforming. A conductive path is formed in both cases: a copper metallic filament for negative electroforming and a titanium dioxide possibly Magneli phase based filament for the positive case. We measured the resistance response of formed samples and studied their remanent resistance states. Bi (tri) stable resistance states were obtained for negative (positive) electroformed samples. The temperature dependence of the resistance discloses the underlying different nature of the associated filaments. In addition, we performed ab initio calculations to estimate the observed electroforming threshold voltages. © 2014 AIP Publishing LLC.

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