Multistate memory devices based on free-standing VO2/TiO2 microstructures driven by Joule self-heating.

Pellegrino, Luca; Manca, Nicola; Kanki, Teruo; Tanaka, Hidekazu; Biasotti, Michele; Bellingeri, Emilio; Siri, Antonio Sergio; Marré, Daniele · Adv Mater · 2012

basic_science · Level V

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Abstract

Two-terminal multistate memory elements based on VO(2)/TiO(2) thin film microcantilevers are reported. Volatile and non-volatile multiple resistance states are programmed by current pulses at temperatures within the hysteretic region of the metal-insulator transition of VO(2). The memory mechanism is based on current-induced creation of metallic clusters by self-heating of micrometric suspended regions and resistive reading via percolation.

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