A5002104906- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Advanced Memory and Neural Computing
- Ferroelectric and Negative Capacitance Devices
- Iron oxide chemistry and applications
- RNA Interference and Gene Delivery
- Electron and X-Ray Spectroscopy Techniques
- Advanced biosensing and bioanalysis techniques
- Ferroelectric and Piezoelectric Materials
- Electrostatics and Colloid Interactions
- Nuclear Materials and Properties
- Semiconductor materials and interfaces
- Integrated Circuits and Semiconductor Failure Analysis
- Physics of Superconductivity and Magnetism
- Advanced Materials Characterization Techniques
- Semiconductor materials and devices
- Machine Learning in Materials Science
- Plasmonic and Surface Plasmon Research
- Perovskite Materials and Applications
- Rare-earth and actinide compounds
- Gold and Silver Nanoparticles Synthesis and Applications
Tsinghua University
2023-2024
Institute of Physics
2015-2022
University of Chinese Academy of Sciences
2017-2020
Aalto University
2020
Chinese Academy of Sciences
2015-2018
National Laboratory for Superconductivity
2015
Resistive switching processes in HfO2 are studied by electron holography and situ energy-filtered imaging. The results show that oxygen vacancies gradually generated the oxide layer under ramped electrical bias, finally form several conductive channels connecting two electrodes. It also shows process occurs at top interface of hafnia layer. As a service to our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may be re-organized for...
Grouping different transition metal oxides together by interface engineering is an important route toward emergent phenomenon. While most of the previous works focused on effects in perovskite/perovskite heterostructures, here we reported a symmetry mismatch-driven spin reorientation perpendicular magnetic anisotropy perovskite/brownmillerite which scarcely seen tensile heterostructures. We show that alternately stacking perovskite La2/3Sr1/3MnO3 and brownmillerite LaCoO2.5 causes strong...
Fabrication of highly mobile spin-polarized two-dimensional electron gas (2DEG) is crucially important for both fundamental and applied research. Usually, spin polarization appears below 10 K the 2DEG $\mathrm{LaAl}{\mathrm{O}}_{3}/\mathrm{SrTi}{\mathrm{O}}_{3}$ interface, stemming from magnetic ordering $\mathrm{T}{\mathrm{i}}^{3+}$ ions with mediation itinerant electrons. Herein, we report a at $\mathrm{L}{\mathrm{a}}_{7/8}\mathrm{S}{\mathrm{r}}_{1/8}\mathrm{Mn}{\mathrm{O}}_{3}$-buffered...
${(\mathrm{LaCo}{\mathrm{O}}_{3}/\mathrm{LaMn}{\mathrm{O}}_{3})}_{5}$ multilayers with fixed $\mathrm{LaMn}{\mathrm{O}}_{3}$ thickness and varying $\mathrm{LaCo}{\mathrm{O}}_{3}$ grown on $\mathrm{SrTi}{\mathrm{O}}_{3}$ (001) substrates are studied by scanning transmission electron microscopy at the atomic scale. Utilizing peak pairs analysis annular bright field images, precise positions degree of octahedral rotation obtained. Our study shows that $c$ axis sandwiched layers experiences a...
Using the technique of aberration-corrected scanning transmission electron microscopy, we performed a systematic analysis for atomic lattice strained La1−xSrxCoO3 (0 ≤ x 0.1) epitaxial films, which have drawn great attention in recent years because their anomalous magnetism. Superstructures characterized by dark stripes are observed image, evolving with combined Sr-doping and strains. Fascinatingly, found close relation between proportion Co ions saturation magnetization film: latter grows...
One of the core issues for A/B site doping in bismuth layer magnetoelectric materials is to find out evolution magnetic structure, crystal structure and elemental distribution, coupling effects between spin lattice with increase ion substitution. Here, we have conducted systematic structural physical property studies on series samples Bi5Ti3Fe1–xCoxO15. This work presents that Bi5Ti3Fe1–xCoxO15 forms a single four perovskite-like 0 ≤ x < 0.67, while three block begins arise ≥ 0.67. With...
Tuning the magnetic properties of perovskite thin films is great significance for design future devices using related materials. The magnetization LaCoO${}_{3}$ closely with stripelike superstructures observed in atomic-scale images. In this work, authors show that La${}_{0.9}$Ca${}_{0.1}$CoO${}_{3}$ grown on SrTiO${}_{3}$ substrate decreases substitution La${}^{3+}$ ions by Ca${}^{2+}$ ions. Interestingly, could again increase introducing a continuous and controllable manner electron beam...
Abstract Deterministic polarization reversal in ferroelectric and multiferroic films is critical for their exploitation nanoelectronic devices. While ferroelectricity has been studied nearly a century, major discrepancies the reported values of coercive fields saturation persist literature many materials. This raises questions about atomic‐scale mechanisms behind reversal. Unconventional switching ε‐Fe 2 O 3 films, material that combines ferrimagnetism at room temperature, reported....
Artificial engineering of an interfacial spin structure complex oxides with strongly coupled spin, orbital, charge and lattice degrees freedom is crucially important for the exploration novel effects associated magnetic tunneling, exchange biasing, injecting/manipulating, which are central issues spintronics. Here we demonstrate presence a distinct interlayer coupling between LaMnO3 (LMO) LaCoO3 (LCO) resulting dramatic effect on structure. We found that LCO layer in (LMO/LCO)5 superlattices...
Perpendicular magnetic anisotropy (PMA) in multilayer thin films promotes the development of spintronic and magnonic research fields. The origin PMA deserves a thorough investigation since it contains rich physics related to multiple factors heterostructure system. Here, we study $\mathrm{L}{\mathrm{a}}_{2/3}\mathrm{S}{\mathrm{r}}_{1/3}\mathrm{Mn}{\mathrm{O}}_{3}$ (LSMO) sandwiched by...
Thin films have attracted much interest because they often novel properties different from those of their bulk counterparts. In this work, we tune two metastable states in three kinds lanthanum cobalt oxide thin by electron beam irradiation and record dynamic transition process situ a transmission microscope. The exhibit homogeneous microstructure the initial state then transfer to stripelike superstructure with 3a0 periodicity (a0 is perovskite lattice parameter), further developing into...
Resistive switching processes in HfO2 are demonstrated by electron holography and situ energy filtered imaging article number 1602976 Jinfeng Kang, Richeng Yu, co-workers. The results identify that oxygen vacancies generated gradually the oxide layer under ramped electrical bias, resulting formation of conductive channels, process occurs at top interface hafnia layer.
Multiple-unit interlocking assembly strategy has provided a method for accelerating the constructing of stable DNA nanostructures with potential numerous applications.
The two-dimensional hole gas (2DHG) at the polar LaAlO3/SrTiO3 interface remains elusive. Different from isostructural perovskite-type interfaces, spinel/perovskite heterointerface of γ-Al2O3/SrTiO3 (GAO/STO) enables us to control interfacial states with sub-unit-cell precision. Herein, we present epitaxial growth fractionally doped GAO/STO heterointerfaces, where GAO is precisely on scale 1/4-unit-cell (0.2 nm) by ferromagnetic Fe3O4 and nonmagnetic ZnO atomic layers. Notably, conduction...
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Deterministic polarization reversal in ferroelectric and multiferroic films is critical for their exploitation nanoelectronic devices. While ferroelectricity has been studied nearly a century, major discrepancies the reported values of coercive fields saturation persist literature many materials. This raises questions about atomic-scale mechanisms behind reversal. Unconventional switching $ε$-Fe2O3 films, material that combines ferrimagnetism at room temperature, here. High-resolution...