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Heating of the Al/SrTiO3−xNy/Al memristor is characterized during electroformation and switching of the resistances. The electrode with the higher voltage potential is heated to higher temperatures than the electrode with the lower potential, suggesting a reversible (nonstable) displacement of the anions in a low voltage region (|V|<±3 V). Application of a threshold voltage appropriate for resistance switching (|V|≥±3 V) facilitates migration of anions to the anode interface and increases the local anode temperature to a maximum of 285 °C. The hysteretic I-V curves are discussed taking into account tunnel barrier formation/break and inhomogeneous Schottky barrier modification at the anode interface.
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Shkabko et al. (2009) studied this question.
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