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Topological Structures In Multiferroics Domain Walls Skyrmions And Vortices
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Book Synopsis Topological Structures in Ferroic Materials by : Jan Seidel
Download or read book Topological Structures in Ferroic Materials written by Jan Seidel and published by Springer. This book was released on 2016-02-12 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a state-of-the art overview of a highly interesting emerging research field in solid state physics/nanomaterials science, topological structures in ferroic materials. Topological structures in ferroic materials have received strongly increasing attention in the last few years. Such structures include domain walls, skyrmions and vortices, which can form in ferroelectric, magnetic, ferroelastic or multiferroic materials. These topological structures can have completely different properties from the bulk material they form in. They also can be controlled by external fields (electrical, magnetic, strain) or currents, which makes them interesting from a fundamental research point of view as well as for potential novel nanomaterials applications. To provide a comprehensive overview, international leading researches in these fields contributed review-like chapters about their own work and the work of other researchers to provide a current view of this highly interesting topic.
Book Synopsis Topological Structures in Multiferroics - Domain Walls, Skyrmions and Vortices by :
Download or read book Topological Structures in Multiferroics - Domain Walls, Skyrmions and Vortices written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Topological structures in multiferroic materials have recently received considerable attention because of their potential use as nanoscale functional elements. Their reduced size in conjunction with exotic arrangement of the ferroic order parameter and potential order parameter coupling allows for emergent and unexplored phenomena in condensed matter and functional materials systems. This will lead to exciting new fundamental discoveries as well as application concepts that exploit their response to external stimuli such as mechanical strain, electric and magnetic fields. In this review we capture the current development of this rapidly moving field with specific emphasis on key achievements that have cast light on how such topological structures in multiferroic materials systems can be exploited for use in complex oxide nanoelectronics and spintronics.
Book Synopsis Multiferroic Materials by : Junling Wang
Download or read book Multiferroic Materials written by Junling Wang and published by CRC Press. This book was released on 2016-10-14 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: "a very detailed book on multiferroics that will be useful for PhD students and researchers interested in this emerging field of materials science" —Dr. Wilfrid Prellier, Research Director, CNRS, Caen, France Multiferroics has emerged as one of the hottest topics in solid state physics in this millennium. The coexistence of multiple ferroic/antiferroic properties makes them useful both for fundamental studies and practical applications such as revolutionary new memory technologies and next-generation spintronics devices. This book provides an historical introduction to the field, followed by a summary of recent progress in single-phase multiferroics (type-I and type-II), multiferroic composites (bulk and nano composites), and emerging areas such as domain walls and vortices. Each chapter addresses potential technological implications. There is also a section dedicated to theoretical approaches, both phenomenological and first-principles calculations.
Download or read book Multiferroics written by Andres Cano and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-06-21 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiferroics, materials with a coexistence of magnetic and ferroelectric order, provide an efficient route for the control of magnetism by electric fields. The authors cover multiferroic thin-film heterostructures, device architectures and domain/interface effects. They critically discuss achievements as well as limitations and assess opportunities for future applications.
Book Synopsis Magnetic Skyrmions and Their Applications by : Giovanni Finocchio
Download or read book Magnetic Skyrmions and Their Applications written by Giovanni Finocchio and published by Woodhead Publishing. This book was released on 2021-06-03 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic skyrmions are particle-like objects described by localized solutions of non-linear partial differential equations. Up until a few decades ago, it was believed that magnetic skyrmions only existed in condensed matter as short-term excitations that would quickly collapse into linear singularities. The contrary was proven theoretically in 1989 and evidentially in 2009. It is now known that skyrmions can exist as long-living metastable configurations in low-symmetry condensed matter systems with broken mirror symmetry, increasing the potential applications possible. Magnetic Skyrmions and their Applications delves into the fundamental principles and most recent research and developments surrounding these unique magnetic particles. Despite achievements in the synthesis of systems stabilizing chiral magnetic skyrmions and the variety of experimental investigations and numerical calculations, there have not been many summaries of the fundamental physical principles governing magnetic skyrmions or integrating those concepts with methods of detection, characterization and potential applications. Magnetic Skyrmions and their Applications delivers a coherent, state-of-the-art discussion on the current knowledge and potential applications of magnetic skyrmions in magnetic materials and device applications. First the book reviews key concepts such as topology, magnetism and materials for magnetic skyrmions. Then, charactization methods, physical mechanisms, and emerging applications are discussed. - Covers background knowledge and details the basic principles of magnetic skyrmions, including materials, characterization, statics and dynamics - Reviews materials for skyrmion stabilization including bulk materials and interface-dominated multilayer materials - Describes both well-known and unconventional applications of magnetic skyrmions, such as memristors and reservoir computing
Book Synopsis Phase-field Simulations of Topological Structures and Topological Phase Transitions in Ferroelectric Oxide Heterostructures by : Zijian Hong
Download or read book Phase-field Simulations of Topological Structures and Topological Phase Transitions in Ferroelectric Oxide Heterostructures written by Zijian Hong and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferroelectrics are materials that exhibit spontaneous electric polarization which can be switched between energy-degenerated states by external stimuli (e.g., mechanical force and electric field) that exceeds a critical value. They have wide potential applications in memories, capacitors, piezoelectric and pyroelectric sensors, and nanomechanical systems. Topological structures and topological phase transitions have been introduced to the condensed matter physics in the past few decades and have attracted broad attentions in various disciplines due to the rich physical insights and broad potential applications. Ferromagnetic topological structures such as vortex and skyrmion are known to be stabilized by the antisymmetric chiral interaction (e.g., Dzyaloshinskii-Moriya interaction). Without such interaction, ferroelectric topological structures (i.e., vortex, flux-closure, skyrmions, and merons) have been studied only recently with other designing strategies, such as reducing the dimension of the ferroelectrics. The overarching goal of this dissertation is to investigate the topological structures in ferroelectric oxide perovskites as well as the topological phase transitions under external applied forces.Pb(Zr,Ti)O3 (PZT) with morphotropic phase boundary is widely explored for high piezoelectric and dielectric properties. The domain structure of PZT tetragonal/rhombohedral (T/R) bilayer is investigated. Strong interfacial coupling is shown, with large polarization rotation to a lower symmetry phase near the T/R interface. Interlayer domain growth can also be captured, with T-domains in the R layer and R-domains in the T layer. For thin PZT bilayer with 5nm of T-layer and 20 nm of R-layer, the a1/a2 twin domain structure is formed in the top T layer, which could be fully switched to R domains under applied bias. While a unique flux-closure pattern is observed both theoretically and experimentally in the thick bilayer film with 50 nm of thickness for both T and R layers. It is revealed that the bilayer system could facilitate the motion of the ferroelastic a-domain in the top T-layer since the a-domain is not directly embedded in the substrate with high density of defects which can pin the domain wall. Excellent dielectric and piezoelectric responses are demonstrated due to the large polarization rotation and the highly mobile domain walls in both the thick and thin bilayer systems.The long-range ordered polar vortex array is observed in the (PbTiO3)n/(SrTiO3)n (PTOn/STOn with n=10~20) superlattices with combined experimental and theoretical studies. Phase-field simulations reveal the three-dimensional textures of the polar vortex arrays. The neighboring vortices rotate in the opposite directions, which extended into tube-like vortex lines perpendicular to the vortex plane. The thickness-dependent phase diagram is predicted and verified by experimental observations. The energetics (the contributions from elastic, electrostatic, gradient and Landau chemical energies) accompanying the phase transitions are analyzed in details. The dominating depolarization energy at short periodicity (n10) favors a1/ a2 twin domain, while the large elastic relaxation and Landau energy reduction at large periodicity (n20) leads to the formation of flux-closure domain with both 90o a/c domain walls and 180o c+/c- domain walls, counterbalancing of the individual energies at intermediate periodicities (n=10~20) gives rise to the formation of exotic vortex structure with continuous polarization rotation surrounding a singularity-like vortex core. Analytical calculations are performed, showing that the stability of the polar vortex structure is directly related to the length of Pi times bulk domain wall width, where vortex structure can be expected when the geometric length scale of the ferroelectrics is close to this value. The role of insulating STO is further revealed, which shows that a rich phase diagram can be formed by simply tuning the thickness of this layer. Wave-like polar spiral phase is simulated by substituting part of the PTO with BiFeO3 (BFO) in the PTO/STO superlattice (i.e., in a (PTO)4/(BFO)4/(PTO)4/(STO)12 tricolor system) which has demonstrate ordered polar vortex lattice. This spiral phase is made up of semi-vortex cores that are floating up-down in the ferroelectric PTO layers, giving rise to a net in-plane polarization. An increase of Curie temperature and topological to regular domain transition temperature (over 200 K) is observed, due to the higher Curie temperature and larger spontaneous polarization in BFO layers. This unidirectional spiral state can be reversibly switched by experimentally feasible in-plane field, which evolves into a metastable vortex structure in-between two spiral phases with opposite in-plane directions.The switching of polar vortex lattice under capacitor field for the (PTO)16/(STO)16 superlattice is studied, which reveals the existence of polar skyrmion state at intermediate applied bias. This is akin to the Rayleigh-Plateau instability in the fluid mechanics. A similar phenomenon is experimentally observed in the ferromagnetic system recently. The skyrmion-like structure will shrink with the further increasing of applied bias after saturation and eventually disappear given sufficiently large bias, leading to the formation of ferroelectric/ferroelastic twin domains with distinct 90o domain walls. Dimensionality cross-over is demonstrated, where a 1-D vortex core structure can be switched to the 2-D domain wall by the joint of two vortices with opposite curls. Electric-field phase diagram is plotted, showing a wide electric field region which could stabilize the metastable polar skyrmion state. This could serve as a road map for the experimental observation of the ferroelectric skyrmion state.
Book Synopsis Topological Structures on Domain Walls by : R. MacKenzie
Download or read book Topological Structures on Domain Walls written by R. MacKenzie and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Skyrmions written by J. Ping Liu and published by CRC Press. This book was released on 2020-03-05 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: The skyrmion, a recently discovered type of domain structure, has interesting topological structure and properties which promise to have a major impact in physics and materials science, thereby leading to development of exciting new electronic and magnetic devices. This book showcases the state of the art in this rapidly growing area, highlighting its importance for the fundamental understanding of magnetism and transport as well as technological applications. The contents begin with a comprehensive look at topological structures and magnetic and transport properties. From there, the chapters turn to experimental studies, including materials and observations, and emerging applications.
Book Synopsis Magnetoelectric Composites by : Mirza I. Bichurin
Download or read book Magnetoelectric Composites written by Mirza I. Bichurin and published by CRC Press. This book was released on 2019-02-22 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to modeling and application of magnetoelectric (ME) effects in layered and bulk composites based on magnetostrictive and piezoelectric materials. Currently, numerous theoretical and experimental studies on ME composites are available but few on the development and research of instruments based on them. So far, only investigation of ME magnetic field sensors has been cited in the existing literature. However, these studies have finally resulted in the creation of low-frequency ME magnetic field sensors with parameters substantially exceeding the characteristics of Hall sensors. The book presents the authors’ many years of experience gained in ME composites and through creation of device models based on their studies. It describes low-frequency ME devices, such as current and position sensors and energy harvesters, and microwave ME devices, such as antennas, attenuators, filters, gyrators, and phase shifters.
Book Synopsis Ferroelectric Domain Walls by : Jill Guyonnet
Download or read book Ferroelectric Domain Walls written by Jill Guyonnet and published by Springer Science & Business Media. This book was released on 2014-04-08 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the nano metric resolution of atomic force microscopy techniques, this work explores the rich fundamental physics and novel functionalities of domain walls in ferroelectric materials, the nano scale interfaces separating regions of differently oriented spontaneous polarization. Due to the local symmetry-breaking caused by the change in polarization, domain walls are found to possess an unexpected lateral piezoelectric response, even when this is symmetry-forbidden in the parent material. This has interesting potential applications in electromechanical devices based on ferroelectric domain patterning. Moreover, electrical conduction is shown to arise at domain walls in otherwise insulating lead zirconate titanate, the first such observation outside of multiferroic bismuth ferrite, due to the tendency of the walls to localize defects. The role of defects is then explored in the theoretical framework of disordered elastic interfaces possessing a characteristic roughness scaling and complex dynamic response. It is shown that the heterogeneous disorder landscape in ferroelectric thin films leads to a breakdown of the usual self-affine roughness, possibly related to strong pinning at individual defects. Finally, the roles of varying environmental conditions and defect densities in domain switching are explored and shown to be adequately modelled as a competition between screening effects and pinning.
Download or read book Domain Walls written by Dennis Meier and published by Oxford University Press. This book was released on 2020-08-07 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technological evolution and revolution are both driven by the discovery of new functionalities, new materials and the design of yet smaller, faster, and more energy-efficient components. Progress is being made at a breathtaking pace, stimulated by the rapidly growing demand for more powerful and readily available information technology. High-speed internet and data-streaming, home automation, tablets and smartphones are now "necessities" for our everyday lives. Consumer expectations for progressively more data storage and exchange appear to be insatiable. Oxide electronics is a promising and relatively new field that has the potential to trigger major advances in information technology. Oxide interfaces are particularly intriguing. Here, low local symmetry combined with an increased susceptibility to external fields leads to unusual physical properties distinct from those of the homogeneous bulk. In this context, ferroic domain walls have attracted recent attention as a completely new type of oxide interface. In addition to their functional properties, such walls are spatially mobile and can be created, moved, and erased on demand. This unique degree of flexibility enables domain walls to take an active role in future devices and hold a great potential as multifunctional 2D systems for nanoelectronics. With domain walls as reconfigurable electronic 2D components, a new generation of adaptive nano-technology and flexible circuitry becomes possible, that can be altered and upgraded throughout the lifetime of the device. Thus, what started out as fundamental research, at the limit of accessibility, is finally maturing into a promising concept for next-generation technology.
Book Synopsis Domains in Ferroic Crystals and Thin Films by : Alexander Tagantsev
Download or read book Domains in Ferroic Crystals and Thin Films written by Alexander Tagantsev and published by Springer Science & Business Media. This book was released on 2011-03-02 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: At present, the marketplace for professionals, researchers, and graduate students in solid-state physics and materials science lacks a book that presents a comprehensive discussion of ferroelectrics and related materials in a form that is suitable for experimentalists and engineers. This book proposes to present a wide coverage of domain-related issues concerning these materials. This coverage includes selected theoretical topics (which are covered in the existing literature) in addition to a plethora of experimental data which occupies over half of the book. The book presents experimental findings and theoretical understanding of ferroic (non-magnetic) domains developed during the past 60 years. It addresses the situation by looking specifically at bulk crystals and thin films, with a particular focus on recently-developed microelectronic applications and methods for observations of domains with techniques such as scanning force microscopy, polarized light microscopy, scanning optical microscopy, electron microscopy, and surface decorating techniques. "Domains in Ferroic Crystals and Thin Films" covers a large area of material properties and effects connected with static and dynamic properties of domains, which are extremely relevant to materials referred to as ferroics. In other textbooks on solid state physics, one large group of ferroics is customarily covered: those in which magnetic properties play a dominant role. Numerous books are specifically devoted to magnetic ferroics and cover a wide spectrum of magnetic domain phenomena. In contrast, "Domains in Ferroic Crystals and Thin Films" concentrates on domain-related phenomena in nonmagnetic ferroics. These materials are still inadequately represented in solid state physics textbooks and monographs.
Book Synopsis Chirality, Magnetism and Magnetoelectricity by : Eugene Kamenetskii
Download or read book Chirality, Magnetism and Magnetoelectricity written by Eugene Kamenetskii and published by Springer Nature. This book was released on 2021-03-27 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses theoretical and experimental advances in metamaterial structures, which are of fundamental importance to many applications in microwave and optical-wave physics and materials science. Metamaterial structures exhibit time-reversal and space-inversion symmetry breaking due to the effects of magnetism and chirality. The book addresses the characteristic properties of various symmetry breaking processes by studying field-matter interaction with use of conventional electromagnetic waves and novel types of engineered fields: twisted-photon fields, toroidal fields, and magnetoelectric fields. In a system with a combined effect of simultaneous breaking of space and time inversion symmetries, one observes the magnetochiral effect. Another similar phenomenon featuring space-time inversion symmetries is related to use of magnetoelectric materials. Cross-coupling of the electric and magnetic components in these material structures, leading to the appearance of new magnetic modes with an electric excitation channel – electromagnons and skyrmions – has resulted in a wealth of strong optical effects such as directional dichroism, magnetochiral dichroism, and rotatory power of the fields. This book contains multifaceted contributions from international leading experts and covers the essential aspects of symmetry-breaking effects, including theory, modeling and design, proven and potential applications in practical devices, fabrication, characterization and measurement. It is ideally suited as an introduction and basic reference work for researchers and graduate students entering this field.
Book Synopsis Magnetism and Accelerator-Based Light Sources by : Hervé Bulou
Download or read book Magnetism and Accelerator-Based Light Sources written by Hervé Bulou and published by Springer Nature. This book was released on 2021-02-17 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book collects the contributions of the seventh school on Magnetism and Synchrotron Radiation held in Mittelwihr, France, from 7 to 12 October 2018. It starts with an introduction to the physics of modern X-ray sources followed by a general overview of magnetism. Next, light / matter interaction in the X-ray range is covered with emphasis on different types of angular dependence of X-ray absorption spectroscopy and scattering. In the end, two domains where synchrotron radiation-based techniques led to new insights in condensed matter physics, namely spintronics and superconductivity, are discussed. The book is intended for advanced students and researchers to get acquaintance with the basic knowledge of X-ray light sources and to step into synchrotron-based techniques for magnetic studies in condensed matter physics or chemistry.
Book Synopsis Ferroelectric Thin Films by : Carlos Paz de Araujo
Download or read book Ferroelectric Thin Films written by Carlos Paz de Araujo and published by Taylor & Francis. This book was released on 1996 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impetus for the rapid development of thin film technology, relative to that of bulk materials, is its application to a variety of microelectronic products. Many of the characteristics of thin film ferroelectric materials are utilized in the development of these products - namely, their nonvolatile memory and piezoelectric, pyroelectric, and electro-optic properties. It is befitting, therefore, that the first of a set of three complementary books with the general title Integrated Ferroelectric Devices and Technologies focuses on the synthesis of thin film ferroelectric materials and their basic properties. Because it is a basic introduction to the chemistry, materials science, processing, and physics of the materials from which integrated ferroelectrics are made, newcomers to this field as well as veterans will find this book self-contained and invaluable in acquiring the diverse elements requisite to success in their work in this area. It is directed at electronic engineers and physicists as well as process and system engineers, ceramicists, and chemists involved in the research, design, development, manufacturing, and utilization of thin film ferroelectric materials.
Book Synopsis Scanning Probe Studies of Structural and Functional Properties of Ferroelectric Domains and Domain Walls by : Philippe Tückmantel
Download or read book Scanning Probe Studies of Structural and Functional Properties of Ferroelectric Domains and Domain Walls written by Philippe Tückmantel and published by Springer Nature. This book was released on 2021-04-26 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the fascinating properties of domain walls in ferroelectric materials. Domain walls can be used as model systems to study fundamental aspects of interface physics, such as crackling noise, with implications extending to a broad variety of systems, from material fracture and earthquakes to solar flares and collective decision making. Ferroelectric domain walls also show functional properties absent from the domains themselves, such as enhanced conduction leading to the tantalizing possibility of reconfigurable nanoelectronic circuitry where domain walls are active components. This work discusses the crackling physics of domain walls in thin films of Pb(Zr0.2Ti0.8)O3, as well as links between the local conductivity of domain walls and nanoscale geometrical distortions due to defects, and discusses unusual polarization textures with rotational components at crossings of ferroelastic twin domains. The results presented in this thesis have important implications for the experimental study of crackling systems.
Book Synopsis PHASE-FIELD SIMULATIONS OF CONTROLLING AND DESIGNING FERROELECTRIC TOPOLOGICAL STRUCTURES AND HIDDEN PHASES IN SUPERLATTICE SYSTEMS. by : Cheng Dai
Download or read book PHASE-FIELD SIMULATIONS OF CONTROLLING AND DESIGNING FERROELECTRIC TOPOLOGICAL STRUCTURES AND HIDDEN PHASES IN SUPERLATTICE SYSTEMS. written by Cheng Dai and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artificial superlattices or multilayers with periodic stacking of different materials at the unit-cell level have attracted substantial interest in recent decades among the scientific community. One particular example is (PbTiO3)n/(SrTiO3)n superlattices, which recently were discovered to exhibit a number of novel physical properties such as negative capacitance and improper ferroelectricity and rich non-trivial topological phases including vortices, polar skyrmions, merons, and antivortices. It has recently been demonstrated that emergent metastable states or hidden phases (e.g., the supercrystal in (PbTiO3)n/(SrTiO3)n superlattices and antipolar phases in BiFeO3 layers) can be stabilized by employing different boundary conditions or revealed by applying external stimuli. They provide a new opportunity to explore and understand these transition states and phase diagrams with a wide range of potential applications. In this dissertation, I investigate the appearance of new hidden states under different mechanical and electric boundary conditions and explore the control of the topological phases or new novel microstructures via thermal, or optical, or electric stimuli. I show that the configuration of vortex-antivortex pairs recently discovered in PbTiO3/SrTiO3 superlattices can be ordered among nearby PbTiO3 layers along the stacking direction. This strain-driven order-disorder transition can be considered an electrostatic decoupling process among PbTiO3 layers. With a tensile substrate strain, a disordered vortex state (where the rotation direction of the vortex arrays in the neighboring ferroelectric layers is random) can be induced in PbTiO3/SrTiO3 superlattices. The ordering determines the type of vortex-antivortex pairs. We tune the pairs using an in-plane electric field. I also determine the antivortex and vortex stabilities of different states with respect to external electric fields. While many studies have explored the microstructures and properties of PbTiO3/SrTiO3 superlattices, a complete picture of how strain affects the topological phase transitions and ferroelectric domain structures has not yet been developed. Here, we build an isotropic strain-periodicity phase diagram of PbTiO3/SrTiO3 superlattices by employing phase-field simulations. I discover a new way to control the emergent skyrmion via tuning misfit strain. I also study the evolution of domain structures subject to anisotropic in-plane strains and identify vortex arrays along the [100]pc and [010]pc directions, as well as new labyrinth vortex arrays. This work offers a deeper understanding of this system and can serve as a guide for manipulating such emergent polar structures through strain engineering. Understanding the phase transitions and domain evolutions of mesoscale topological structures in ferroic materials is critical to realizing their potential applications in next-generation high-performance storage devices. We study the behaviors of a mesoscale supercrystal with three-dimensional nanoscale periodicity and rotational topology phases in a PbTiO3/SrTiO3 superlattice under thermal and electrical stimuli using a combination of phase-field simulations and X-ray diffraction experiments. I construct a phase diagram of temperature versus polar state, showing the formation of the supercrystal from a mixed vortex and a-twin state and a temperature-dependent erasure process of a supercrystal returning to a classical a-twin structure. Under an in-plane electric field bias at room temperature, the vortex topology of the supercrystal irreversibly transforms into a new type of stripe-like supercrystal. Under an out-of-plane electric field, the vortices inside the supercrystal undergo a topological phase transition to polar skyrmions. These results demonstrate the potential for the on-demand manipulation of polar topology and transformations in supercrystals using electric fields. The findings also provide a theoretical understanding that can be utilized to guide the design and control of mesoscale polar structures and to explore novel polar structures in other systems and their topological nature. Finally, antiferroelectric materials have attracted much attention due to their applications in a number of energy-efficient devices. However, only few antiferroelectric materials have been explored, and most involve lead. Accordingly, we introduce a new design strategy for the prediction of antiferroelectric materials employing interfacial electrostatic engineering. We begin with the well-known multiferroelectric material BiFeO3 with high polarization. By building up BiFeO3/dielectrics superlattices using density functional theory and phase-field simulations together with experimental observations, we show that a metastable antiferroelectric structure can be induced. At the same time, the misfit strain imposed by substrate provides another pathway for the design of antiferroelectric materials with various domain structures. This work offers a deeper understanding of this system and provides a guide for designing such emergent polar structures via strain, electrostatic, and size engineering.
