Figure 1

(a) X-ray diffraction patterns of Ge₂₅Se₇₅ with increasing pressure (written on the continuous curves in GPa unit) and of the measured empty cell (red dashed line). (b) The pressure dependence of the principal peak position of the XRD patterns for Ge_xSe_100−x. The black solid lines are guides to the eye, marking the high and low pressure regimes while the dashed lines indicate the transition in Ge₁₇Se₈₃ glass.