A5101783825- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- 2D Materials and Applications
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Topological Materials and Phenomena
- Ferroelectric and Piezoelectric Materials
- Graphene research and applications
- MXene and MAX Phase Materials
- Rare-earth and actinide compounds
- Molecular Junctions and Nanostructures
- Nuclear materials and radiation effects
- Iron-based superconductors research
- Surface and Thin Film Phenomena
- Advanced biosensing and bioanalysis techniques
- Advanced Nanomaterials in Catalysis
- Thermochemical Biomass Conversion Processes
- Quantum and electron transport phenomena
- Magnetic Properties of Alloys
- Fiber-reinforced polymer composites
- Nanocluster Synthesis and Applications
- Superconductivity in MgB2 and Alloys
- Thermal and Kinetic Analysis
- Membrane Separation and Gas Transport
Max Planck Institute for Solid State Research
2018-2024
Leibniz Institute for Solid State and Materials Research
2022-2024
Linyi University
2024
University of Science and Technology Liaoning
2020-2024
Zhengzhou University of Light Industry
2021-2023
Jinan University
2018-2019
Wuhan Donghu University
2019
Collaborative Innovation Center of Advanced Microstructures
2011-2017
Nanjing University
1992-2017
National Laboratory of Solid State Microstructures
2017
Abstract Semiconducting two-dimensional transition metal dichalcogenides are emerging as top candidates for post-silicon electronics. While most of them exhibit isotropic behaviour, lowering the lattice symmetry could induce anisotropic properties, which both scientifically interesting and potentially useful. Here we present atomically thin rhenium disulfide (ReS 2 ) flakes with unique distorted 1T structure, in-plane properties. We fabricated monolayer few-layer ReS field-effect...
Abstract Tungsten ditelluride has attracted intense research interest due to the recent discovery of its large unsaturated magnetoresistance up 60 T. Motivated by presence a small, sensitive Fermi surface 5 d electronic orbitals, we boost properties applying high pressure, and introduce superconductivity successfully. Superconductivity sharply appears at pressure 2.5 GPa, rapidly reaching maximum critical temperature ( T c ) 7 K around 16.8 followed monotonic decrease in with increasing...
The progress in exploiting new electronic materials and devices has been a major driving force solid-state physics. As state of matter, Weyl semimetal (WSM), particularly type-II WSM, hosts fermions as emergent quasiparticles may harbor novel electrical transport properties because the exotic Fermi surface. Nevertheless, such WSM material not experimentally observed nature. In this work, by performing systematic magneto-transport studies on thin films predicted candidate WTe2, we observe...
The current efforts to find the materials hosting Kitaev model physics have been focused on Mott insulators of d^5 pseudospin-1/2 ions Ir^{4+} and Ru^{3+} with t_{2g}^5(S=1/2, L=1) electronic configuration. Here we propose that can be realized in based d^7 t_{2g}^5e_g^2(S=3/2, configuration such as Co^{2+}, which also host magnetism. Considering possible exchange processes, derived interactions 90^{\circ} bonding geometry. obtained Hamiltonian comprises bond-directional K isotropic...
We report the detailed electronic structure of WTe$_2$ by high resolution angle-resolved photoemission spectroscopy. Unlike simple one electron plus hole pocket type Fermi surface topology reported before, we resolved a rather complicated WTe$_2$. Specifically, there are totally nine pockets, including at Brillouin zone center $\Gamma$, and two pockets on each side $\Gamma$ along $\Gamma$-$X$ direction. Remarkably, have observed circular dichroism in our spectra, which suggests that orbital...
We study the exchange interactions and resulting magnetic phases in honeycomb cobaltates. For a broad range of trigonal crystal fields acting on Co2+ ions, low-energy pseudospin-1/2 Hamiltonian is dominated by bond-dependent Ising couplings that constitute Kitaev model. The non-Kitaev terms nearly vanish at small values field \Delta, spin liquid ground state. Considering Na3Co2SbO6 as an example, we find this compound proximate to phase, can be driven into it slightly reducing \Delta \sim 20...
An antiferromagnetic insulating state has been found in the zigzag phosphorene nanoribbons (ZPNRs) from a comprehensive density functional theory calculations. Comparing with other one-dimensional systems, magnetism ZPNRs display several surprising characteristics: (i) magnetic moments are antiparallel arranged at each edge; (ii) is quite stable energy (about 29 meV/magnetic-ion) and band gap big 0.7 eV); (iii) moderate compressive strain will induce to nonmagnetic as well semiconductor...
Abstract α -RuCl 3 is a major candidate for the realization of Kitaev quantum spin liquid, but its zigzag antiferromagnetic order at low temperatures indicates deviations from model. We have quantified Hamiltonian by resonant inelastic x-ray scattering study Ru L absorption edge. In paramagnetic state, quasi-elastic intensity magnetic excitations has broad maximum around zone center without any local maxima Bragg wavevectors. This finding implies that fragile and readily destabilized...
ReS<sub>2</sub>is a stable and efficient photocatalyst with potential applications in the use of solar energy for water splitting.
The consequences of the Jahn-Teller (JT) orbital-lattice coupling for magnetism pseudospin J_{eff}=1/2 and J_{eff}=0 compounds are addressed. In former case, represented by Sr_{2}IrO_{4}, this generates, through so-called pseudo-JT effect, orthorhombic deformations a crystal concomitant with magnetic ordering. orthorhombicity axis is tied to magnetization rotates it under field. theory resolves number puzzles in Sr_{2}IrO_{4} such as origin in-plane anisotropy magnon gaps, metamagnetic...
High-temperature coal tar pitch is often used to produce high-quality needle coke. Its basic properties [such as fa value, β resin, and quinoline insoluble (QI) content] significantly affect the quality of resulting Refined with β-resin values in 0.95–0.98 13–16% ranges, respectively, considered an excellent raw material for this purpose. The influence QI content on characteristics coal-based coke still not fully clarified literature. To analyze how affects properties, work 10 different...
As the first experimentally confirmed ferroelectric metal, ${\mathrm{LiOsO}}_{3}$ has received extensive research attention recently. Using density-functional calculations, we perform a systematic study on origin of metallic ferroelectricity in ${\mathrm{LiOsO}}_{3}$. We confirm that transition this compound is order-disorder-like. By doing electron screening analysis, unambiguously demonstrate long-range order results from incomplete dipole-dipole interaction along nearest-neighboring Li-Li...
Spin-orbit entangled magnetic dipoles, often referred to as pseudospins, provide a new avenue explore novel magnetism inconceivable in the weak spin-orbit coupling limit, but nature of their low-energy interactions remains be understood. We present comprehensive study static and pseudospin dynamics archetypal Mott insulator Sr2IrO4. find that order understand even basic magnetization measurements, formerly overlooked in-plane anisotropy is fundamental. In addition magnetometry, we use...
The electric-current stabilized semimetallic state in the quasi-two-dimensional Mott insulator ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ exhibits an exceptionally strong diamagnetism. Through a comprehensive study using neutron and x-ray diffraction, we show that this nonequilibrium phase assumes crystal structure distinct from those of equilibrium metallic phases realized ruthenates by chemical doping, high pressure, epitaxial strain, which turn leads to electronic band structure. Dynamical...
This paper reviews the current progress on searching Kitaev spin liquid state in 3d electron systems. Honeycomb cobaltates were recently proposed as promising candidates to realize state, due more localized wave functions of ions compared with that 4d and 5d ions, also easy tunability exchange Hamiltonian favor interaction. Several key parameters have large impacts constants, such charge-transfer gap trigonal crystal field, are identified discussed. Specifically, tuning field effect by means...
The effect of Sr/Ti nonstoichiometry on the ferroelectricity and magnetism in polycrystalline SrTiO${}_{3}$ is investigated by dielectric, ferroelectric, Raman, magnetic characterizations. It revealed that nonstoichiometric exhibits both ferroelectric polarization superparamagnetism, which increase with degree nonstoichiometry. argued antisite-like defects net local dipoles moments contribute to confirmed first-principles calculations.
Double-perovskite A2BB'O6 oxides with magnetic B and B' ions E*-type antiferromagnetic order (E*-AFM, i.e. the ↑↑↓↓ structure) are believed to exhibit promising multiferroic properties, Y2CoMnO6 (YCMO) is one candidate in this category. However, microscopic origins for magnetically induced ferroelectricity YCMO remain unclear. In study, we perform detailed symmetry analysis on exchange striction effect lattice distortion, plus first-principles calculations YCMO. The E*-AFM state as ground...