Semiconductor indium selenide phase-change memory using electric current is a billion-fold more energy efficient

https://interestingengineering.com/science/data-storage-phase-change-memory-advances

"instead of energy intensive melt-quench process… amorphous phase: atoms randomly arranged… ferroelectric property allows it to polarize spontaneously, piezoelectric nature generates electric current as response to mechanical stress, rapidly deforming it… electric current causes tiny sections to begin amortizing, making unstable, deforming… as distorted regions collide, sound waves generate, resulting in more deformation/ amorphous areas, enabling low-power data storage”