A nanoscale continuous transition from the monoclinic to ferroelectric orthorhombic phase inside HfO2 nanocrystals stabilized by HfO2 capping and self-controlled Ge doping

A transition from the monoclinic to ferroelectric orthorhombic phase, takes place within a region of few atomic layers of single HfO 2 crystals. Atomic calculations show high stability of the ferroelectric orthorhombic phase.