Article
Physics, Multidisciplinary
Kevin J. A. Franke, Colin Ophus, Andreas K. Schmid, Christopher H. Marrows
Summary: Through micromagnetic simulations and analytical modeling, it has been found that Neel walls can be formed even in the absence of a Dzyaloshinskii-Moriya interaction, but with uniaxial in-plane magnetic anisotropy. The ability to switch between Bloch and Neel walls can be achieved via modulation of both in-plane and perpendicular magnetic anisotropy, opening up possibilities for electric field control of domain wall type with small applied voltages.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Natascha Hedrich, Kai Wagner, Oleksandr V. Pylypovskyi, Brendan J. Shields, Tobias Kosub, Denis D. Sheka, Denys Makarov, Patrick Maletinsky
Summary: The study demonstrated manipulation and interaction of antiferromagnetic domain walls using isolated 180 degree domain walls in a single crystal of Cr2O3, proposing a memory architecture based on topographically defined antiferromagnetic domain walls. These results advance the understanding of domain wall mechanics in antiferromagnets.
Article
Chemistry, Multidisciplinary
Zijian Hong, Sujit Das, Christopher Nelson, Ajay Yadav, Yongjun Wu, Javier Junquera, Long-Qing Chen, Lane W. Martin, Ramamoorthy Ramesh
Summary: Controlling domain formation in ferroelectric materials at the nanoscale is crucial for exploring emergent phenomena and technological prospects. Polar vortices can play a similar role as ferroelectric domain walls, but with the ability to accommodate charged domains, making them reversible under an external applied field.
Article
Materials Science, Multidisciplinary
Dexin Yang, Jining Zhou, Juan Hu, Dexuan Huo, Xuefeng Zhang, Michael A. Carpenter
Summary: The strain coupling and relaxation dynamics associated with the ferrimagnetic/ferroelastic phase transition in the double perovskite Ba2FeReO6 have been investigated. The results show that the ferroelastic shear strain, arising from spin/orbit coupling, causes softening of the shear modulus below the transition temperature. The analysis also reveals that the precursor microstructures and mixed magnetic/ferroelastic domains below the transition temperature depend on the thermal history of the sample.
Article
Biochemistry & Molecular Biology
Tiancong Chai, Celine Terrettaz, Justine Collier
Summary: DNA mismatch repair (MMR) process can detect and correct replication errors in organisms, and significantly reduce the appearance of rifampicin resistances in Alphaproteobacterium such as Caulobacter crescentus. MutS and MutL proteins are associated with the replisome during the S-phase of C. crescentus cell cycle, with the spatial association of MutL with the replisome being critical for MMR in C. crescentus.
NUCLEIC ACIDS RESEARCH
(2021)
Article
Physics, Condensed Matter
Zhong-Chen Gao, Yuxuan Yang, Yuanchang Su, Jingguo Hu, Chan Park
Summary: The interactions between spin wave (SW) and stacked domain walls in a magnetic nanostrip were studied in this research. Stacked transverse walls (STWs) showed good stability and could serve as excellent SW channels.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Nanoscience & Nanotechnology
Xiaomei He, Xiangdong Ding, Jun Sun, Guillaume F. F. Nataf, Ekhard K. H. Salje
Summary: In this study, molecular dynamics simulations were performed to identify the ridges and valleys with rounded singularities around the intersections between twin walls and surfaces. The two dominant length scales observed were due to the elastic bending of the surface layer and local atomic reshuffles. For static twin walls, the change in Young's modulus involved softening near valleys and hardening near ridges. The boundary-induced changes in the surface Young's modulus were approximately 0.7%.
Article
Multidisciplinary Sciences
Sonka Reimers, Dominik Kriegner, Olena Gomonay, Dina Carbone, Filip Krizek, Vit Novak, Richard P. Campion, Francesco Maccherozzi, Alexander Bjorling, Oliver J. Amin, Luke X. Barton, Stuart F. Poole, Khalid A. Omari, Jan Michalicka, Ondrej Man, Jairo Sinova, Tomas Jungwirth, Peter Wadley, Sarnjeet S. Dhesi, Kevin W. Edmonds
Summary: This study reveals that the antiferromagnetic (AF) domain structure in CuMnAs thin films is dominated by nanoscale structural twin defects, which play a crucial role in determining the location and orientation of AF domain walls. The results provide insights into the interplay of crystalline defects, strain, and magnetic ordering in AF materials, offering a route to optimize device performance.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Jintao Shuai, Robbie G. Hunt, Thomas A. Moore, John E. Cunningham
Summary: Surface acoustic waves (SAWs) have potential for energy-efficient control of magnetic domain walls (DWs) due to the magnetoelastic coupling effect. However, the dissipation of RF power in a SAW device can cause heating and affect the DW motion. This study measured the heating of a SAW device and evaluated the DW velocity in a thin film, finding that heating plays a major role in promoting DW motion and magnetoelastic coupling is more important than heating for enhanced DW motion.
PHYSICAL REVIEW APPLIED
(2023)
Article
Astronomy & Astrophysics
Francesco Bigazzi, Aldo L. Cotrone, Andrea Olzi
Summary: When axionic strings carry a global charge, domain walls bounded by such strings may not be allowed to decay completely. This happens in particular in some models where a composite axionlike particle is the pseudo-Nambu-Goldstone boson of chiral symmetry breaking of an extra quark flavor. In this case, the global symmetry is the extra flavor baryonic symmetry. The corresponding axionic domain walls can carry a baryonic charge: they represent the low energy description of the baryons made by the extra quark flavor. Basic properties of these particles, such as spin, mass scale, and size are discussed. The corresponding charged axionic strings are explicitly constructed in a specific calculable model.
Article
Materials Science, Ceramics
Mojca Otonicar, Mirela Dragomir, Tadej Rojac
Summary: This article highlights the importance of domain walls in ferroelectric and relaxor-based oxide ceramics and discusses their impact on material properties. By studying the dynamics of domain walls, insights into the design and application of these materials can be gained.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yurii Tikhonov, Jesi R. Maguire, Conor J. McCluskey, James P. McConville, Amit Kumar, Haidong Lu, Dennis Meier, Anna Razumnaya, John Martin Gregg, Alexei Gruverman, Valerii M. Vinokur, Igor Luk'yanchuk
Summary: Ferroelectric domain walls play an important role in novel materials physics, where polarization discontinuities often lead to emergent 2D conductivity. In multiaxial ferroelectrics, complex topological patterns can ameliorate such discontinuities, while in uniaxial ferroelectrics, discontinuities are assumed to be unavoidable. However, experimental and theoretical investigations on lead germanate reveal that polar discontinuities can be obviated by mutual domain bifurcation along different axes, creating a characteristic saddle-point domain wall morphology and associated novel dipolar topology.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Haidong Lu, Yueze Tan, Leonie Richarz, Jiali He, Bo Wang, Dennis Meier, Long-Qing Chen, Alexei Gruverman
Summary: Piezoresponse force microscopy (PFM) is used to investigate the electromechanical behavior of the head-to-head (H-H) and tail-to-tail (T-T) domain walls on the non-polar surfaces of three uniaxial ferroelectric materials. It is found that the crystal at the H-H and T-T domain walls exhibit an out-of-plane deformation even in the absence of the out-of-plane polarization component due to a specific form of the piezoelectric tensor. The dominant contribution comes from the counteracting shear strains on both sides of the domain walls, regardless of the materials' symmetry.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Pavel Marton, Mauro A. P. Goncalves, Marek Pasciak, Sabine Koerbel, Venceslav Chumchal, Martin Plesinger, Antonin Klic, Jirka Hlinka
Summary: We conducted a theoretical investigation on a charged 180 degrees domain wall in ferroelectric PbTiO3, compensated by randomly distributed immobile charge defects, using atomistic shell-model simulations and continuous phase-field simulations. Our predictions show that the domain walls form a zigzag pattern, accompanied by local polarization rotation, which provides an efficient mechanism for charge compensation.
Article
Engineering, Geological
Angelo Aloisio, Matteo Pelliciari, Stefano Sirotti, Francesco Boggian, Roberto Tomasi
Summary: This paper focuses on the optimum design of the e-CLT technology. The authors conducted quasi-static and nonlinear dynamic analyses to investigate the performance of the technology. The results show that using e-CLT technology can provide advantages and the range of optimum performance of the AFC is estimated.
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Kyle P. Kelley, Sergei Kalinin, Eugene Eliseev, Shivaranjan Raghuraman, Stephen Jesse, Peter Maksymovych, Anna N. Morozovska
Summary: Ferroelectric domain walls are fascinating objects in condensed matter physics with a wide range of functional behaviors. However, most studies have focused on bias-induced dynamics and transport behaviors. This article introduces a scanning probe microscopy approach that combines piezoresponse force microscopy (PFM) with a dynamically heated probe, allowing for exploration of thermal polarization dynamics and phase transitions at individual domain walls. The strong and weak modulation regimes for thermal PFM are discussed, along with the potential applications of the heated probe approach for various functional SPM measurements.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Multidisciplinary
A. S. Yurkov, P. V. Yudin
Summary: This article investigates the flexoelectric effect in nano-scale materials and proposes an approximate mathematical model. Nonclassical higher order terms are treated using variational calculus. Analytical solutions are obtained for a circular plate with round electrodes, and the influence of boundary conditions on deformation is studied.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ulises Acevedo-Salas, Boris Croes, Yide Zhang, Olivier Cregut, Kokou Dodzi Dorkenoo, Benjamin Kirbus, Ekta Singh, Henrik Beccard, Michael Ruesing, Lukas M. Eng, Riccardo Hertel, Eugene A. . Eliseev, Anna N. Morozovska, Salia Cherifi-Hertel
Summary: This study investigates the polarization profile of uncharged 180 degrees domain walls in LiNbO3, and finds that the curvature of the domain wall is correlated with the variation of its internal polarization, resulting in modulations of the Neel-like character. The study suggests that curved interfaces in solid crystals may provide opportunities for tailoring nanoscale polar states.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Yulian M. Vysochanskii, Viktoria V. Khist, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the study investigates screening-induced phase transitions in core-shell ferroic nanoparticles of three different shapes: an oblate disk, a sphere, and a prolate needle. The results demonstrate that the screening length of the shell has a critical influence on the phase transitions and spontaneous polarization of the nanoparticle core. The tunable screening shell allows the control of the polar state and phase diagrams, which can be of great significance for nonvolatile memory cells.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the stress-induced transformations of polarization switching in CuInP2S6 nanoparticles of different shapes were studied. The semiconducting properties of the nanoparticles were modeled using a surface-charge layer with a small effective screening length due to the field effect. The results showed a strong and unusual influence of hydrostatic pressure on polarization switching, hysteresis loop shape, magnitude of remanent polarization, and coercive fields.
PHYSICAL REVIEW APPLIED
(2023)
Article
Computer Science, Artificial Intelligence
Yongtao Liu, Anna N. Morozovska, Eugene A. Eliseev, Kyle P. Kelley, Rama Vasudevan, Maxim Ziatdinov, Sergei V. Kalinin
Summary: Using hypothesis-learning-driven automated scanning probe microscopy (SPM), this study investigates the bias-induced transformations in various devices and materials. It is crucial to understand these mechanisms on the nanometer scale with a wide range of control parameters, which is experimentally challenging. The hypothesis-driven SPM autonomously identifies the mechanisms of bias-induced domain switching and reveals the importance of kinetic control.
Article
Chemistry, Multidisciplinary
Yongtao Liu, Anna N. Morozovska, Ayana Ghosh, Kyle P. Kelley, Eugene A. Eliseev, Jinyuan Yao, Ying Liu, Sergei Kalinin
Summary: In this study, the local curvature and strain effects on polarization in CIPS were investigated using piezoresponse force microscopy and spectroscopy. The finite element Landau-Ginzburg-Devonshire model was introduced to explain the observed behaviors and decouple the curvature and strain effects in 2D CIPS. The results showed that bending induced ferrielectric domains in CIPS and the polarization-voltage hysteresis loops differed in bending and nonbending regions. These studies provide important insights into the fabrication of curvature-engineered nanoelectronic devices.
Article
Chemistry, Physical
Kyle P. Kelley, Anna N. Morozovska, Eugene A. Eliseev, Yongtao Liu, Shelby S. Fields, Samantha T. Jaszewski, Takanori Mimura, Sebastian Calderon, Elizabeth C. Dickey, Jon F. Ihlefeld, Sergei V. Kalinin
Summary: Ferroelectricity in binary oxides such as hafnia and zirconia has attracted attention due to unconventional physical mechanisms and potential integration into semiconductor workflows. Recent research suggests that factors such as electrochemical boundary conditions and strain heavily influence the ferroelectric properties. The interplay between ferroelectric and structural instabilities, coupled with non-local screening, explains the emergence of these properties.
Article
Physics, Applied
Anna N. Morozovska, Maksym V. Strikha, Kyle P. Kelley, Sergei V. Kalinin, Eugene A. Eliseev
Summary: This study develops an effective model to describe the charge-polarization coupling behavior between a thin film and graphene, and explains the nonlinear relationship between Landau expansion coefficients and film thickness and chemical composition. The research finds that the polarization of the film strongly influences the conductivity of graphene, and the charge distribution in graphene can be controlled by manipulating the film's electric field dependence.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Venkatraman Gopalan, Long-Qing Chen
Summary: We propose an analytical Landau-Ginzburg (LG) theory that describes the charge density waves coupled with lattice and electronic long-range order parameters. The theory is applicable to various long-range order phenomena, such as superconducting Cooper pairs, structural distortions, electric polarization, and magnetization. We introduce a biquadratic coupling between the charge density gradient and the long-range order parameters, which plays a critical role in the appearance of spatially modulated phases in charge-ordered ferroics and high-temperature superconductors.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Ayana Ghosh, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Sergei V. Kalinin
Summary: In this study, the strain-induced polarization reversal in a ferroelectric CuInP2S6 (CIPS) thin film with conductive electrodes is explored. The study reveals an unusually strong effect of mismatch strain on the out-of-plane polarization reversal, hysteresis loop shape, dielectric susceptibility, and piezoelectric response of CIPS films.
