Simulating Crystalline GST for Phase-Change Memory Applications - Odhiambo, Henry
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The reversible amorphous-cubic phase transition in GST has already been successfully applied in phase-change memory devices. However, there are proposals that an amorphous-hexagonal-cubic transition could offer the possibility of a tri-state memory device, thereby doubling the current data storage capacity. In this study, the structural, thermal, electronic and optical properties of hexagonal and cubic GST have been simulated from first principles. Although pure GST exhibits superior qualities in terms of speed of transition and thermal stability, several aspects such as the minimization of…mehr

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Produktbeschreibung
The reversible amorphous-cubic phase transition in GST has already been successfully applied in phase-change memory devices. However, there are proposals that an amorphous-hexagonal-cubic transition could offer the possibility of a tri-state memory device, thereby doubling the current data storage capacity. In this study, the structural, thermal, electronic and optical properties of hexagonal and cubic GST have been simulated from first principles. Although pure GST exhibits superior qualities in terms of speed of transition and thermal stability, several aspects such as the minimization of the writing current and a reduction in the wavelength of the writing laser beam need to be addressed. In this study, the effect of nitrogen doping on the optical and electronic properties of GST has been analyzed from first principles.
Autorenporträt
Dr. Henry Odhiambo has a PhD in Computational Materials Science. Currently he is a lecturer in the Department of Physics and Materials Science at Maseno University. His research interests include modeling materials for memory and energy applications using ab initio methods.