Ultrasonic search for the floppy-rigid transition in bulk se1–x gex glasses

Abstract

No transitions occur in the room temperature longitudinal and transverse elastic constants of Se1-xGex glasses up to × = 0.30. The transverse elastic constant appears to saturate near × = 0.25. These results contradict a random network model for these glasses which predicts a transition at ×p =0.20, but they are not inconsistent with a molecular cluster model.