A5045612744- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Ferroelectric and Piezoelectric Materials
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Acoustic Wave Resonator Technologies
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- 2D Materials and Applications
- Topological Materials and Phenomena
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- Perovskite Materials and Applications
- Ferroelectric and Negative Capacitance Devices
- Dielectric properties of ceramics
- Conducting polymers and applications
- Quantum and electron transport phenomena
- Semiconductor materials and devices
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum Dots Synthesis And Properties
Tsinghua University
2016-2025
Beijing Academy of Quantum Information Sciences
2019-2025
State Key Laboratory of Low-Dimensional Quantum Physics
2015-2025
Collaborative Innovation Center of Quantum Matter
2015-2025
Dalian Maritime University
2025
Kunming University of Science and Technology
2025
Renmin Hospital of Wuhan University
2025
Fudan University
2025
Wuhan University
2025
University of Science and Technology of China
2024
Ultrahigh energy density dielectric film Dielectrics help hold charge as capacitors and are fundamental storage components. Improving other properties may these materials be more competitive with batteries for applications. Pan et al. introduced a specific type of nanodomain structure in BiFeO 3 -BaTiO -SrTiO solid solution that dramatically increased the density. The nanodomains were organized so to minimize loss during polarization switching. enhancement suggests strategy useful designing...
Intrinsic magnetic topological insulator (TI) is a stoichiometric compound possessing both inherent order and electronic states. Such material can provide shortcut to various novel quantum effects but remains elusive experimentally so far. Here, we report the experimental realization of high-quality thin films an intrinsic TI---MnBi$_2$Te$_4$---by alternate growth Bi$_2$Te$_3$ quintuple-layer MnTe bilayer with molecular beam epitaxy. The shows archetypical Dirac surface states in...
We demonstrate a highly reproducible control of local electron transport through ferroelectric oxide via its spontaneous polarization. Electrons are injected from the tip an atomic force microscope into thin film lead-zirconate titanate, Pb(Zr0.2Ti0.8)O3, in regime tunneling assisted by high electric field (Fowler-Nordheim tunneling). The current exhibits pronounced hysteresis with abrupt switching events that coincide, within experimental resolution, large polarization PZT results up to...
Detailed analysis of transport, magnetism, and x-ray absorption spectroscopy measurements on ultrathin ${\text{La}}_{0.7}{\text{Sr}}_{0.3}{\text{MnO}}_{3}$ films with thicknesses from 3 to 70 unit cells resulted in the identification a lower critical thickness for nonmetallic nonferromagnetic layer at interface ${\text{SrTiO}}_{3}$ (001) substrate only three $(\ensuremath{\sim}12\text{ }\text{\AA{}})$. Furthermore, linear-dichroism demonstrate presence preferred...
We report the formation of a novel ferromagnetic state in antiferromagnet ${\mathrm{BiFeO}}_{3}$ at interface with ferromagnet ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$. Using x-ray magnetic circular dichroism Mn and Fe ${L}_{2,3}$ edges, we discovered that development this spin structure is strongly associated onset significant exchange bias. Our results demonstrate directly related to an electronic orbital reconstruction interface, which supported by linearly polarized...
Epitaxial oxide interfaces with broken translational symmetry have emerged as a central paradigm behind the novel behaviors of superlattices. Here, we use scanning transmission electron microscopy to demonstrate direct, quantitative unit-cell-by-unit-cell mapping lattice parameters and oxygen octahedral rotations across ${\mathrm{BiFeO}}_{3}\mathrm{\text{\ensuremath{-}}}{\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ interface elucidate how change crystal is accommodated. Combined...
We report direct experimental evidence for a room-temperature, $\ensuremath{\sim}130\text{ }\text{ }\ensuremath{\mu}\mathrm{C}/{\mathrm{cm}}^{2}$ ferroelectric polarization from the tetragonal-like ${\mathrm{BiFeO}}_{3}$ phase. The physical origin of this remarkable enhancement has been investigated by combination x-ray absorption spectroscopy, scanning transmission electron microscopy, and first principles calculations. A large strain-induced Fe-ion displacement relative to oxygen...
We report a proof-of-concept demonstration of negative capacitance effect in nanoscale ferroelectric-dielectric heterostructure. In bilayer ferroelectric, Pb(Zr0.2Ti0.8)O3 and dielectric, SrTiO3, the composite was observed to be larger than constituent SrTiO3 capacitance, indicating an effective layer. Temperature is shown tuning parameter for ferroelectric degree enhancement Landau's mean field theory based calculations show qualitative agreement with effects. This work underpins...
We demonstrate a direct correlation between the domain structure of multiferroic BiFeO3 thin films and exchange bias Co 0.9Fe 0.1/BiFeO3 heterostructures. Two distinct types interactions - an enhancement coercive field ( enhancement) combined with large shifts hysteresis loop bias) have been observed in these heterostructures, which depend directly on type crystallography nanoscale approximately 2 nm) walls film. show that magnitude interaction scales length 109 degrees ferroelectric BiFeO 3...
Ferroelectricity in functional materials remains one of the most fascinating areas modern science past several decades. In last years, rapid development piezoresponse force microscopy (PFM) and spectroscopy revealed presence electromechanical hysteresis loops bias-induced remnant polar states a broad variety including many inorganic oxides, polymers, biosystems. cases, this behavior was interpreted as ample evidence for ferroelectric nature system. Here, we systematically analyze PFM...
The control of material interfaces at the atomic level has led to novel interfacial properties and functionalities. In particular, study polar discontinuities between complex oxides lies frontier modern condensed matter research. Here we employ a combination experimental measurements theoretical calculations demonstrate bulk property, namely ferroelectric polarization, heteroepitaxial bilayer by precise atomic-scale interface engineering. More specifically, is achieved exploiting valence...