A low- to high-density pressure-driven phase transition in amorphous silicon is investigated by synchrotron x-ray diffraction in the diamond anvil cell. Complementary atomistic molecular dynamics computer simulations provide ...

Supercooled liquids in the Y2O3-Al2O3 system undergo a liquid–liquid phase transition between a high–temperature, high–density amorphous (HDA) polymorph form and one with lower density (LDA form) that is stable at lower ...