129I and 119Sn Mössbauer spectroscopy, reversibility window and nanoscale phase separation in binary GexSe1−x glasses

The molecular structure of the prototypical chalcogenide glass system-GexSe1−x in the 00.15, rigid regions nucleate at the expense of floppy ones, and the ratio IB/IA (x) reverses slope to display a global maximum in the 0.200.26, these glasses enter a stressed-rigid elastic phase and in the 0.31