Decoding the Complexity of Ferroelectric Orthorhombic HfO2: A Unified Mode Expansion Approach

Chenxi Yu, Jiajia Zhang, Xujin Song +2

The ferroelectricity in ${\mathrm{HfO}}_2$ thin films is widely attributed to the formation of a polar orthorhombic phase named OIII phase. However, the complexity of OIII phase orig…