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Title: Switching it up: New mechanisms revealed in wurtzite-type ferroelectrics

Journal Article · · Science Advances

Wurtzite-type ferroelectrics have drawn increasing attention due to the promise of better performance and integration than traditional oxide ferroelectrics with semiconductors such as Si, SiC, and III-V compounds. However, wurtzite-type ferroelectrics generally require enormous electric fields, approaching breakdown, to reverse their polarization. The underlying switching mechanism(s), especially for multinary compounds and alloys, remains elusive. Here, we examine the switching behaviors in Al1-xScxN alloys and wurtzite-type multinary candidate compounds we recently computationally identified. We find that switching in these tetrahedrally coordinated materials proceeds via a variety of nonpolar intermediate structures and that switching barriers are dominated by the more-electronegative cations. For Al1-xScxN alloys, we find that the switching pathway changes from a collective mechanism to a lower-barrier mechanism enabled by inversion of individual tetrahedra with increased Sc composition. Our findings provide insights for future engineering and realization of wurtzite-type materials and open a door to understanding domain motion.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
2370393
Report Number(s):
NREL/JA--5K00-87652; MainId:88427; UUID:6e85b1e7-04ae-40c0-a3dc-4050c09b30e3; MainAdminId:72737
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 20 Vol. 10; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

References (45)

Spontaneous polarization and piezoelectric constants of III-V nitrides journal October 1997
First-principles calculations of the ground-state properties and stability of ScN journal January 2002
A computational search for wurtzite-structured ferroelectrics with low coercive voltages journal December 2020
Two-dimensional ferroelectrics from high throughput computational screening journal March 2023
Covalent-like bondings and abnormal formation of ferroelectric structures in binary ionic salts journal January 2023
A generalized solid-state nudged elastic band method journal February 2012
Macroscopic polarization in crystalline dielectrics: the geometric phase approach journal July 1994
A Landau–Devonshire analysis of strain effects on ferroelectric Al1−xScxN journal July 2022
A Segmented‐Target Sputtering Process for Growth of Sub‐50 nm Ferroelectric Scandium–Aluminum–Nitride Films with Composition and Stress Tuning journal April 2021
Effects of deposition conditions on the ferroelectric properties of (Al 1− x Sc x )N thin films journal September 2020
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Correcting density functional theory for accurate predictions of compound enthalpies of formation: Fitted elemental-phase reference energies journal March 2012
An automatically curated first-principles database of ferroelectrics journal March 2020
Application of ferroelectric materials for improving output power of energy harvesters journal November 2018
Tunable optoelectronic and ferroelectric properties in Sc-based III-nitrides journal October 2013
Non-Kolmogorov-Avrami switching kinetics in ferroelectric thin films journal December 2002
Doping effects on the ferroelectric properties of wurtzite nitrides journal March 2023
Dynamics of polarization reversal in virgin and fatigued ferroelectric ceramics by inhomogeneous field mechanism journal July 2010
Piezoelectric effect and polarization switching in Al 1− x Sc x N journal September 2021
Ferroelectric YAlN grown by molecular beam epitaxy journal July 2023
AlScN: A III-V semiconductor based ferroelectric journal March 2019
Structural analysis of polarity inversion boundary in sputtered AlN films annealed under high temperatures journal May 2019
In‐Grain Ferroelectric Switching in Sub‐5 nm Thin Al0.74Sc0.26N Films at 1 V journal June 2023
Bulk and film synthesis pathways to ternary magnesium tungsten nitrides journal January 2023
Enhancement of Piezoelectric Response in Scandium Aluminum Nitride Alloy Thin Films Prepared by Dual Reactive Cosputtering journal December 2008
Intentional polarity conversion of AlN epitaxial layers by oxygen journal September 2018
Fully epitaxial ferroelectric ScGaN grown on GaN by molecular beam epitaxy journal September 2021
In-memory computing with resistive switching devices journal June 2018
Role of disorder in the synthesis of metastable zinc zirconium nitrides journal April 2022
Mechanisms of polytype stabilization during the wurtzite-sphalerite transition journal February 1982
Mimicking biological neurons with a nanoscale ferroelectric transistor journal January 2018
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Inversion domains in GaN grown on sapphire journal October 1996
Local chemical origin of ferroelectric behavior in wurtzite nitrides journal January 2022
Symmetry relations in wurtzite nitrides and oxide nitrides and the curious case of Pmc21 journal March 2021
Mechanism of polarization switching in wurtzite-structured zinc oxide thin films journal September 2016
Ferroelectricity in wurtzite structure simple chalcogenide journal June 2014
Principles and Applications of Ferroelectrics and Related Materials book February 2001
Ferroelectrics everywhere: Ferroelectricity in magnesium substituted zinc oxide thin films journal July 2021
Generalized Gradient Approximation Made Simple journal October 1996
Next generation ferroelectric materials for semiconductor process integration and their applications journal March 2021
Atomic-scale polarization switching in wurtzite ferroelectrics journal June 2023
Origin of the Anomalous Piezoelectric Response in Wurtzite Sc x Al 1 − x N Alloys journal April 2010
Ferroelectricity in boron-substituted aluminum nitride thin films journal April 2021
Wurtzite and fluorite ferroelectric materials for electronic memory journal April 2023