Ferroelectric Materials, Devices and Applications

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 541

Special Issue Editors


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Guest Editor
1. Faculty of Integrated Circuit, Xidian University, Xi’an 710126, China
2. Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China
Interests: hafnium oxides; ferroelectric materials; field-effect transistors; memory

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Guest Editor
Academy of Advanced Interdisciplinary Research, School of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710126, China
Interests: nanogenerator; piezotronics; piezoelectric; sensor; ferroelectric
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Special Issue Information

Dear Colleagues,

Ferroelectric materials exhibit spontaneous polarization under an external electric field, which can be reversibly switched by changing the applied voltage. This unique property, among others, makes them highly attractive in a wide range of electronic and sensing applications. Since the initial discovery of ferroelectricity in Rochelle salt, research on ferroelectric materials has continuously evolved—from traditional perovskite oxides to emerging systems such as doped hafnia (HfO2), aluminum–scandium nitride (AlxSc1−xN), and two-dimensional materials. These advances provide new solutions to scalability and CMOS compatibility challenges, leading to renewed interest in ferroelectric-based devices such as FeRAMs, FeFETs, negative-capacitance transistors, and neuromorphic synaptic devices.

This Special Issue aims to provide an overview of recent advances and future perspectives in ferroelectric materials, devices, and applications. We welcome original research and review papers on topics including novel ferroelectric materials, nanostructures, heterostructures, interfaces, and domain engineering, as well as the integration of ferroelectric materials with other functional materials.

We warmly invite researchers to contribute their latest findings to this Special Issue in order to advance this exciting field.

Dr. Huan Liu
Prof. Dr. Rusen Yang
Guest Editors

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Keywords

  • ferroelectric
  • FeRAM
  • FeFET
  • memory
  • electro-optical

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Published Papers (1 paper)

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Research

16 pages, 2026 KB  
Article
Broadband Dielectric Response of Group-II Metal Oxide Monolayers: From Ionic to Electronic Polarization
by Pei Yin, Dongliang Jia, Dan Tan and Rusen Yang
Micromachines 2026, 17(5), 564; https://doi.org/10.3390/mi17050564 - 1 May 2026
Viewed by 256
Abstract
The dielectric response provides an integral description of polarization mechanisms across frequency ranges and constitutes a key physical basis for understanding ferroelectric behavior. Here, we systematically investigate the broadband dielectric response of Group-II metal oxide (BeO, MgO, CaO, ZnO, and CdO) monolayers using [...] Read more.
The dielectric response provides an integral description of polarization mechanisms across frequency ranges and constitutes a key physical basis for understanding ferroelectric behavior. Here, we systematically investigate the broadband dielectric response of Group-II metal oxide (BeO, MgO, CaO, ZnO, and CdO) monolayers using first-principles calculation. In the low-frequency regime, ionic polarization governs the dielectric response. A distinctive feature is the LO–TO degeneracy at the Γ point accompanied by a V-shaped nonanalytic LO phonon dispersion. d-state hybridization increases with the metal atomic number, resulting in higher Born effective charge, which works together with phonon softening, reduced mass and unit cell area to significantly strengthen the ionic dielectric contribution. The quasiparticle band gap decreases with the metal atomic number, driving redshifts of the dielectric function and wide band optical response from the deep-ultraviolet to the near-infrared. Particularly, CdO exhibits the strongest electronic polarization, with an optical dielectric constant of 2.68 and a static refractive index of 1.64. This work establishes a complete dielectric spectrum from ionic to electronic polarization, providing theoretical guidance for polarization engineering and design of two-dimensional ferroelectric devices. Full article
(This article belongs to the Special Issue Ferroelectric Materials, Devices and Applications)
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