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The onset of crystallization in phase-change memory devices is studied by simulating an initially amorphous sample through a disordered network of localized states. The transport of charge and electron energy is self-consistently coupled to the Poisson and the Fourier heat equations, so that crystallization sites are found at the nanoscale. Results show how Ovonic switching and crystallization are...
Phase-change memory (PCM) is a promising candidate for non-volatile data storage. In this study, a key step in this area, by inducing ultra-narrow (5-10 nm) phase-change regions with individual single-wall carbon nanotube (SWNTs) heaters, and programming currents of the order 10 ??A was demonstrated. Electrical measurements of such devices show step-like increases in current (up to 15 ??A steps) that...
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