Article 3 – Strain-polarization coupling in the low-dimensional Van der Waals Ferrielectrics

Abstract:

Using the Landau-Ginzburg-Devonshire phenomenological approach we explore the strain-polarization coupling in the low-dimensional van der Waals ferrielectrics. We evolve the analytical model of the piezoelectric susceptibility of the material in response to the periodic strain modulation, such as caused by a surface acoustic wave. Numerical calculations are performed for recently discovered and poorly studied ultrathin layers of the van der Waals ferrielectric CuInP2S6, which are very promising candidates for advanced nanoelectronics. We obtained that the temperature dependences of the dielectric and piezoelectric susceptibilities, and elastic compliance of the ultrathin CuInP2S6 layer have a sharp maximum at the temperature of CuInP2S6 paraelectric-ferrielectric phase transition near 320 K. The magnitudes of the dielectric and piezoelectric susceptibilities, and elastic compliance depend significantly on the modulation period of the surface acoustic wave. Obtained results explore the potential of ultrathin CuInP2S6 layers for application in piezoelectric and straintronic devices.

Title: Strain-polarization coupling in the low-dimensional Van der Waals Ferrielectrics

Authors: Anna N. Morozovska, Hanna V. Shevliakova, Liubomyr M. Korolevych, Victoria Khist, Yulian M. Vysochanskii, Eugene A. Eliseev

Reference: arXiv:2404.09689 [cond-mat.mtrl-sci]

DOI: https://doi.org/10.48550/arXiv.2404.09689

Article 17 – Interfacially coupled Bi2WO6@WS2-PVDF based film for sonophotocatalytic trimethoprim removal: From material engineering to surface- and groundwater applications

2026-07-13

Abstract: Pharmaceutical contaminants in water represent a growing environmental concern due to their persistence and potential ecotoxicity. In this study, a hybrid Bi2WO6@WS2-PVDF-HFP (Poly(vinylidene fluoride-co-hexafluoropropylene) film was developed and evaluated as a sonophotocatalytic platform for the efficient degradation of trimethoprim (TMP) in both model and real water matrices. Comprehensive structural,

Article 16 – Electrostriction-driven phase instability enables giant pseudo-piezoelectricity in Hf0.5Zr0.5O2X

2026-07-13

Abstract: The electromechanical properties of hafnium zirconium oxide fluorite (Hf0.5Zr0.5O2, HZO) remain largely unexplored despite its widespread use as a ferroelectric in CMOS-compatible devices. Here, we demonstrate that electrostriction-driven phase instability enables a giant pseudo-piezoelectric response in epitaxial HZO thin films. Above a critical field of 24 kilovolts per centimeter, field-induced

Article 15 – Photo-pyroelectric Effect in Piezoelectric Polymer Composites: An Innovative Pathway for Advanced Technologies

2026-03-20

Abstract: The development of smart materials that can react to external stimuli and provide controlled and frequently reversible responses is facilitated by the coupling of physical effects. In this work, a photo-pyroelectric effect based on a piezoelectric polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) polymer composite with fullerene C60 incorporated at different concentrations (1, 3,

Article 14 – Magnetic properties and charge transport mechanisms in oxygen-deficient HfxZr1-xO2-y nanoparticles

2026-03-11

Abstract: Study of nanoscale hafnia-zirconia physical properties is the key topic in fundamental and applied science. However, charge transport mechanisms and magnetic properties of HfxZr1-xO2 nanoparticles are very poorly studied both theoretically and experimentally. In this work we observed a superparamagnetic-like and superparaelectric-like response of ultra-small HfxZr1-xO2-y nanoparticles prepared by the solid-state

Article 13 – Electro-Chemo-Mechanical Coupling in Hf0.5Zr0.5O2 Ferroionic Heterostructures

2026-03-11

Abstract: Ferroelectricity in Hf0.5Zr0.5O2 (HZO) originates from a polymorphic landscape where the metastable orthorhombic phase competes with monoclinic and tetragonal forms, making functional properties highly sensitive to structural instability. Recent strategies have exploited ionic-vacancy mechanisms, either through redox interactions with the environment or by employing ferroionic heterostructures, to enhance ferroelectric performance.

Article 12 – Flexocoupling-induced phonons and ferrons in van der Waals ferroelectrics

2025-08-05

Abstract: The contribution of flexoelectric coupling to the long-range order parameter fluctuations in ferroics can be critically important to the ferron dispersion and related polar, pyroelectric, and electrocaloric (EC) properties. Here, we calculate analytically the dispersion relations of soft optic and acoustic flexocoupling-induced phonons and ferrons by incorporating the flexoelectric