A5102844841- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- 2D Materials and Applications
- Ferroelectric and Piezoelectric Materials
- MXene and MAX Phase Materials
- Thin-Film Transistor Technologies
- HVDC Systems and Fault Protection
- Physics of Superconductivity and Magnetism
- Iron-based superconductors research
- Silicon and Solar Cell Technologies
- High voltage insulation and dielectric phenomena
- Perovskite Materials and Applications
- Electronic and Structural Properties of Oxides
- Boron and Carbon Nanomaterials Research
- CCD and CMOS Imaging Sensors
- Electrostatic Discharge in Electronics
- Thermal Analysis in Power Transmission
- Electrocatalysts for Energy Conversion
- Frequency Control in Power Systems
- Thermal properties of materials
- High-Voltage Power Transmission Systems
- Magnetic properties of thin films
- Intermetallics and Advanced Alloy Properties
- Smart Grid and Power Systems
Dalian Jiaotong University
2025
Hangzhou Normal University
2025
Second Affiliated Hospital of Xi'an Jiaotong University
2024
KTH Royal Institute of Technology
2024
Soochow University
2024
Sun Yat-sen University
2021-2024
Jiangsu University
2024
Huazhong University of Science and Technology
2024
ShanghaiTech University
2023
Yantai University
2022-2023
Intrinsic magnetic van der Waals (vdW) materials have attracted much attention, especially ${\mathrm{Fe}}_{3}{\mathrm{GeTe}}_{2}$ (FGT), which exhibits highly tunable properties. However, despite vast efforts, there are still several challenging issues to be resolved. Here, using a first-principles linear-response approach, we carry out comprehensive investigation of both bulk and monolayer FGT. We find that although the exchange interactions in FGT frustrated, our Monte Carlo simulations...
Magnetoelectric coupling in pyroelectric ${\mathrm{CaBaCo}}_{4}$${\mathrm{O}}_{7}$ is investigated using ab intio calculations and Landau theory. The former shows that exchange striction strong enough to produce a giant change electric polarization upon ferrimagnetic ordering, comparable the experimentally determined value of $\ensuremath{\sim}17\phantom{\rule{0.16em}{0ex}}{\mathrm{mC}/\mathrm{m}}^{2}$. Furthermore, theory demonstrates magnetoelastic responsible for magnetoelectric appearing...
Abstract Hierarchical porous carbon materials hold great potential in electrochemical energy storage, yet their efficient fabrication still faces numerous challenges. Herein, we successfully prepared hierarchical with high specific surface area, broad pore size distribution, and interconnected structures by direct co-pyrolysis of wheat straw potassium hydroxide, leveraging the natural reticular structure straw. As an electrode material for symmetric supercapacitors, CS-800 exhibited...
We investigate the phase diagrams of RMn(2)O(5) via a first-principles effective-Hamiltonian method. are able to reproduce most important features complicated magnetic and ferroelectric transitions. The calculated polarization as function temperature agrees very well with experiments. dielectric-constant step at commensurate-to-incommensurate transition is reproduced. microscopic mechanisms for transitions discussed.
Cupric oxide is a unique magnetic ferroelectric material with transition temperature significantly higher than the boiling point of liquid nitrogen. However, mechanism high-T(c) multiferroicity in CuO remains puzzling. In this Letter, we clarify by using combined first-principles calculations and an effective hamiltonian model. We find that contains two sublattices, strong intrasublattice interactions weakly frustrated intersublattice interactions. The weak spin frustration leads to...
Structural and magnetic chiralities are found to coexist in a small group of materials which they produce intriguing phenomenologies such as the recently discovered skyrmion phases. Here, we describe previously unknown manifestation this interplay MnSb2O6, trigonal oxide with chiral crystal structure. Unlike all other known cases, MnSb2O6 structure is based on co-rotating cycloids rather than helices. The coupling structural chirality provided by axial vector, related so-called vector...
The electronic structures, phonon dispersions, and electron–phonon coupling of Nb2CT2 (T = O, S, Se, or Te) MXenes were investigated via first-principles calculations. Different models constructed, the results show that low-energy are intrinsic phonon-mediated superconductors. Of four MXenes, Nb2CO2 MXene exhibits largest superconducting critical temperature (Tc) 14.43 K. existence soft modes induced by Kohn anomalies contribution Nb atoms to Fermi level lead strong (λ 0.92) in MXene. Tc is...
We develop a theory of electromagnons in CuO by combining symmetry analysis based on irreducible corepresentations, ab initio calculations, and simulations spin dynamics using model Hamiltonian the Landau-Lifshitz-Gilbert equation. show that electromagnon measured [Jones et al., Nat. Commun. 5, 3787 (2014)] with electric field along [101] direction originates from magnetoelectric coupling mediated Dzyaloshinskii-Moriya interactions consists rigid rotation Cu spins around axis defined field....
We demonstrate an efficient numerical method to calculate three-tangle of general mixed states. construct a "energy function" (target function) for the state under certain constrains. The is then optimized via replica exchange Monte Carlo method. have extensively tested examples with known analytical results, showing remarkable agreement. can be applied other optimization problems in quantum information theory.
In order to flexibly compensate reactive power, it is necessary develop a controllable reactor in long distance and ultrahigh voltage system. A leakage flux-controlled (LFCR) developed this paper. The operation principles of LFCR are discussed detail, 380 V single-phase prototype developed. Relevant experiments have been done test its performance. results the indicate that has no harmonic reactance stable. Also, with two control windings can realize four kinds adjustment rates: 1.94%,...
In this paper, we present a 55” UHD AMOLED TV developed at G8.5 using IGZO backplane and tandem white‐OLED with COA (color filter on array), which is considered as one of the feasible options for mass production. We also implement external optical compensation to achieve good display uniformity.
We study the electronic and magnetic structures of multiferroic ${\mathrm{CaMn}}_{7}{\mathrm{O}}_{12}$ by first-principles calculations, based on experimentally determined modulated crystal structure. confirm presence a $3d$ orbital modulation Mn2 ${\text{(Mn}}^{3+}$) sites, previously inferred from Jahn-Teller distortions. Our results indicate that in phase structure Mn3 ${\text{(Mn}}^{4+}$) sites is anharmonically via orbitally mediated coupling with structural modulation,...
We have investigated the magnetic structure and ferroelectricity in $\mathrm{RbFe}(\mathrm{MoO}{}_{4}){}_{2}$ via first-principles calculations. Phenomenological analyses shown that may arise due to both triangular chirality of through coupling between helicity ferroaxial structural distortion. Indeed, it was recently proposed distortion plays a key role stabilizing chiral itself. determined relative contribution two mechanisms ab initio Whilst axiality does induce helix by modulating...
Based on first-principles calculations, an antiferromagnetic Ising model a triangular lattice has been proposed to interpret the order of Fe$(1)$-Ge pairs and formation $\sqrt{3}$ $\times $ superstructures in Fe$_5$GeTe$_2$ (F5GT), as well predict existence similar Ni doped F5GT (Ni-F5GT). Our study suggests that systems may be considered structural realization known lattice. superstructures, Heisenberg-Landau Hamiltonian, taking into account both Heisenberg interactions longitudinal spin...