“…Phase-change memory (PCM) based on chalcogenide compounds has been considered to be the most promising candidate for next-generation nonvolatile data storage techniques such as digital versatile disk-random access memory (DVD-RAM), due to its excellent physical performance [1][2][3][4][5][6]. Currently, Ge 2 Sb 2 Te 5 (GST) films are the best chalcogenide material for PCM and have received sustained attention [7][8][9][10][11].…”