Defects and aliovalent doping engineering in electroceramics

Y Feng, J Wu, Q Chi, W Li, Y Yu, W Fei - Chemical reviews, 2020 - ACS Publications
Since the positive influences of defects on the performance of electroceramics were
discovered, investigations concerning on defects and aliovalent doping routes have grown …

Review of defect chemistry in fluorite-structure ferroelectrics for future electronic devices

MH Park, DH Lee, K Yang, JY Park, GT Yu… - Journal of Materials …, 2020 - pubs.rsc.org
Ferroelectricity in fluorite-structure oxides, such as (doped) HfO2 and ZrO2, and their solid
solution, nanolaminates, and superlattices has attracted increasing interest for future …

Scale-free ferroelectricity induced by flat phonon bands in HfO2

HJ Lee, M Lee, K Lee, J Jo, H Yang, Y Kim, SC Chae… - Science, 2020 - science.org
Discovery of robust yet reversibly switchable electric dipoles at reduced dimensions is
critical to the advancement of nanoelectronics devices. Energy bands flat in momentum …

Phase-exchange-driven wake-up and fatigue in ferroelectric hafnium zirconium oxide films

SS Fields, SW Smith, PJ Ryan… - … applied materials & …, 2020 - ACS Publications
Ferroelectric hafnium zirconium oxide holds great promise for a broad spectrum of
complementary metal–oxide–semiconductor (CMOS) compatible and scaled microelectronic …

The atomic-scale domain wall structure and motion in HfO2-based ferroelectrics: A first-principle study

W Ding, Y Zhang, L Tao, Q Yang, Y Zhou - Acta Materialia, 2020 - Elsevier
The HfO 2-based ferroelectrics have aroused considerable attention due to their potential
application in silicon process-compatible memory devices. However, the ferroelectricity …

[HTML][HTML] A perspective on semiconductor devices based on fluorite-structured ferroelectrics from the materials–device integration perspective

JY Park, K Yang, DH Lee, SH Kim, Y Lee… - Journal of Applied …, 2020 - pubs.aip.org
Ferroelectric materials are known to be ideal materials for nonvolatile memory devices,
owing to their two electrically switchable spontaneous polarization states. However …

Stabilization of Competing Ferroelectric Phases of under Epitaxial Strain

Y Qi, S Singh, C Lau, FT Huang, X Xu, FJ Walker… - Physical review …, 2020 - APS
Hafnia (HfO 2)-based thin films have promising applications in nanoscale electronic devices
due to their robust ferroelectricity and integration with silicon. Identifying and stabilizing the …

Electric auxetic effect in piezoelectrics

J Liu, S Liu, JY Yang, L Liu - Physical Review Letters, 2020 - APS
Auxetic materials are characterized by a negative Poisson's ratio that they expand laterally
in the directions perpendicular to the applied stretching stress and vice versa. Piezoelectrics …

Effects of Strain and Film Thickness on the Stability of the Rhombohedral Phase of

Y Zhang, Q Yang, L Tao, EY Tsymbal, V Alexandrov - Physical Review Applied, 2020 - APS
The discovery of ferroelectric polarization in Hf O 2-based ultrathin films has spawned much
interest due to their potential applications in data storage. In 2018, an R 3 m rhombohedral …

Phase competition in with applied electric field from first principles

Y Qi, KM Rabe - Physical Review B, 2020 - APS
In this work, the results of first-principles density-functional-theory calculations are used to
construct the energy landscapes of HfO 2 and its Y and Zr substituted derivatives as a …