Universal memory incorporating GST467 combines speed of RAM and long-term memory of flash

https://www.livescience.com/technology/electronics/universal-memory-breakthrough-replaces-ram-flash-next-generation-of-computers-major-speed-boost

" GST467 made from antimony, terbium and germanium, repeating layer in stacked-layer superlattic... both short- and long-term storage... ideal for use in phase change material storage, higher crystallization and lower melting temperatures (retain data >10 years even at >248°F)... stable, robust, speed, low cost, energy efficient 0.7 volts, non-toxic, heat confined to material, low manufacturing temperatures"