232 citations · 637 across the 18 of their papers we have counts for
4 papers · 1 filter
Kinetically-stabilized Ferroelectricity in Bulk Singlecrystalline HfO2:Y without Wake-up Effects
Xianghan Xu, Fei-Ting Huang, Yubo Qi +6
HfO2, a simple binary oxide, holds ultra-scalable ferroelectricity integrable into silicon technology. Polar orthorhombic (Pbc21) form in ultra-thin-films ascribes as the plausible…
Phase Competition in HfO with Applied Electric Field from First Principles
Yubo Qi, Karin M. Rabe
In this work, the results of first-principles density-functional-theory calculations are used to construct the energy landscapes of HfO and its Y and Zr substituted derivatives…
Negative piezoelectricity in low--dimensional materials
Yubo Qi, Andrew M. Rappe
In this study, we investigate the underlying mechanisms of the negative piezoelectricity in low--dimensional materials by carrying out first--principles calculations. Two--dimensio…
Stabilization of competing ferroelectric phases of HfO under epitaxial strain
Yubo Qi, Sobhit Singh, Claudia Lau +6
Hafnia (HfO)-based thin films have promising applications in nanoscale electronic devices due to their robust ferroelectricity and integration with silicon. However, HfO ha…