Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The stabilization of intermediate polar phases in fluorite-structured oxides is critical for advancing ferroelectric and antiferroelectric applications. Here, we report the stabilization of epitaxial polar tetragonal (T) ZrO. Epitaxial HfZrO thin films (x = 1, 0.75, 0.5, 0.25, and 0) are synthesized on (001) yttria-stabilized zirconia substrates via atomic layer deposition. The emergence of the unprecedented polar T-ZrO phase deviates from the expected phase transition from nonpolar HfO through ferroelectric HfZrO to antiferroelectric Zr-rich HfZrO. Second harmonic generation measurements reveal unexpected inversion symmetry breaking in T-phase ZrO. High-resolution 4D-scanning transmission electron microscopy further confirms the presence of electric dipoles originating from off-centered oxygen displacements. These findings establish a pathway for the low-temperature epitaxial synthesis of HfO-ZrO-based materials and provide critical insight into the polar nature of T-phase ZrO.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12314912 | PMC |
| http://dx.doi.org/10.1021/acs.nanolett.5c02741 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Crystal structure of bis-(1-methyl-1-imidazole-κ )(5,10,15,20-tetra-phenyl-porphyrinato-κ )iron(II) toluene tris-olvate.
Acta Crystallogr E Crystallogr Commun
September 2025
College of Materials Science and Opto-electronic Technology University of Chinese Academy of Sciences, Huairou Beijing 101408 People's Republic of China.
The title complex, [Fe(CHN)(CHN)]·3CH, possesses inversion symmetry with the iron(II) atom located on a center of symmetry. The metal atom is coordinated in a symmetric octa-hedral geometry by four pyrrole N atoms of the porphyrin ligand in the equatorial plane and two N atoms of 1-methyl-imidazole ligands in the axial sites; the complex crystallizes with three toluene solvent mol-ecules. The average Fe-N (N is a porphyrin N atom) bond length is 1.
View Article and Find Full Text PDFEnhanced magnetic second-harmonic generation in an ultra-compact plasmonic nanocavity.
Light Sci Appl
September 2025
Department of Materials Science and Engineering, Centre for Functional Photonics, and Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, Hong Kong, China.
Observation of the second-harmonic generation (SHG) from subwavelength metallic structures is often hindered by the interrelations of higher-order multipolar contributions. In particular, the magnetic Lorentz contribution to SHG is often neglected due to the ineffective magnetic field enhancement in electrically resonant structures. Here, we demonstrate a strong Lorentz-driven SHG output at the plasmon-induced magnetic dipolar resonance in inversion-symmetry-broken plasmonic nanocavities.
View Article and Find Full Text PDFProton Ordering Induces a Polar Structure in the Antiferromagnetic Solid Proton Conductor FeH(PO).
J Am Chem Soc
September 2025
Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstrasse 28/30, 48149 Münster, Germany.
Materials exhibiting coexisting exploitable properties often result in especially attractive behavior from both fundamental and applied perspectives. In particular, magnetoelectric materials combining ferroelectric and magnetic properties are increasingly becoming paramount nowadays. Here, we show that FeH(PO) exhibits proton conductivity and the coexistence of magnetic and polar structural features, suggesting that such frameworks may be of broader interest beyond the field of proton conductors.
View Article and Find Full Text PDFDetecting the Six Polytypes of Five-Layer Graphite.
Adv Mater
September 2025
School of Physics and Astronomy, Tel Aviv University, Tel Aviv, 6997801, Israel.
Graphene layers can assemble in two shifted metastable positions per interface, leading to eight possible structural arrangements in five-layer graphene, six of which correspond to distinct periodic crystals. These polytypes exhibit diverse symmetries, interlayer electronic hybridization, van der Waals adhesion, and optical responses. Arrangements lacking inversion [I] and mirror [M] symmetries host intrinsic polarizations, while those with sufficiently flat electronic bands display orbital magnetization, unconventional superconductivity, and anomalous fractional quantum Hall states.
View Article and Find Full Text PDFEngineering noncentrosymmetry in 2D atomic crystals chemical vapor deposition.
Chem Commun (Camb)
August 2025
State Key Laboratory of Advanced Materials for Intelligent Sensing, Ministry of Science and Technology & Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University,
In contrast to extensively studied centrosymmetric 2D materials, noncentrosymmetric 2D atomic crystals (2DACs) exhibit unique properties-such as nonlinear optical responses, ferroelectricity, and piezoelectricity-making them promising for next-generation optoelectronics and quantum devices. Despite their potential, the controlled synthesis and scalable fabrication of these materials remain challenging, limiting further exploration of their physics and applications. This Feature Article highlights our group's recent advances in engineering noncentrosymmetry in 2DACs chemical vapor deposition (CVD).
View Article and Find Full Text PDF