A5036294487- Topological Materials and Phenomena
- Graphene research and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Cognitive Science and Education Research
- Advanced Condensed Matter Physics
- Quantum and electron transport phenomena
- Covalent Organic Framework Applications
- Advanced Photocatalysis Techniques
- Polyoxometalates: Synthesis and Applications
- Mechatronics Education and Applications
- Magnetic and transport properties of perovskites and related materials
- Catalytic Processes in Materials Science
- Magnetic properties of thin films
- 2D Materials and Applications
- Chemical Synthesis and Reactions
- Quantum many-body systems
- Magnetism in coordination complexes
- CO2 Reduction Techniques and Catalysts
- Atomic and Subatomic Physics Research
- Design Education and Practice
- Gold and Silver Nanoparticles Synthesis and Applications
- Radical Photochemical Reactions
- Phase-change materials and chalcogenides
- University-Industry-Government Innovation Models
- Communication and COVID-19 Impact
Dalian University of Technology
2020-2025
Chinese Academy of Sciences
2011-2025
Beijing Institute of Technology
2022-2025
Dalian Institute of Chemical Physics
2021-2025
Dalian National Laboratory for Clean Energy
2025
Tsinghua University
2015-2024
Beijing Academy of Quantum Information Sciences
2020-2024
Hefei University
2023-2024
University of Leicester
2024
People's Hospital of Cangzhou
2024
The quantized version of the anomalous Hall effect has been predicted to occur in magnetic topological insulators, but experimental realization challenging. Here, we report observation quantum (QAH) thin films Cr-doped (Bi,Sb)2Te3, a insulator. At zero field, gate-tuned resistance reaches value h/e^2,accompanied by considerable drop longitudinal resistance. Under strong vanishes whereas remains at value. QAH may lead development low-power-consumption electronics.
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...
Topological insulators (TI) are a new class of quantum materials with insulating bulk enclosed by topologically protected metallic boundaries. The surface states three-dimensional TIs have spin helical Dirac structure, and robust against time reversal invariant perturbations. This extraordinary property is notably exemplified the absence backscattering nonmagnetic impurities weak antilocalization (WAL) fermions. Breaking symmetry (TRS) magnetic element doping predicted to create variety...
Thin films of magnetically doped topological insulators Cr0.22(BixSb1-x)1.78Te3 are found to possess carrier-independent long-range ferromagnetic order with perpendicular magnetic anisotropy. The anomalous Hall resistance is greatly enhanced, up one quarter quantum resistance, by depletion the carriers. results demonstrate this material as a promising system realize quantized effect. As service our authors and readers, journal provides supporting information supplied authors. Such materials...
The breaking of time reversal symmetry in topological insulators may create previously unknown quantum effects. We observed a magnetic phase transition Cr-doped Bi2(SexTe1-x)3 insulator films grown by means molecular beam epitaxy. Across the critical point, is revealed through both angle-resolved photoemission measurements and density functional theory calculations. present strong evidence that bulk band topology fundamental driving force for transition. tunable properties this system are...
The stability of metal-organic frameworks (MOFs) typically decreases with an increasing number defects, limiting the defects that can be created and catalytic other applications. Herein, we use a hemilabile (Hl) linker to create up maximum six per cluster in UiO-66. We synthesized UiO-66 (Hl-UiO-66) using benzene dicarboxylate (BDC) as 4-sulfonatobenzoate (PSBA) linker. PSBA acts not only modulator but also coligand enhances resulting defective framework. Furthermore, upon postsynthetic...
UiO-66 is regarded as an epitome of metal-organic frameworks (MOFs) because its stability. Defect engineering has been used a toolbox to alter the performance MOFs. among most widely explored MOFs capability bear high number defects without undergoing structural collapse. Several representative works in field MOF-based defect are available based on UiO-66. In this review, more emphasis given toward construction catalytic sites by including all detailed synthesis procedures for inducing...
Abstract Covalent Organic Frameworks (COFs) have recently emerged as light‐harvesting devices, well elegant heterogeneous catalysts. The combination of these two properties into a dual catalyst has not yet been explored. We report new photosensitive triazine‐based COF, decorated with single Ni sites to form catalyst. This crystalline and highly porous shows excellent catalytic performance in the visible‐light‐driven sulfur–carbon cross‐coupling reaction. Incorporation transition metal COF...
Hantzsch esters (HEs) are widely recognized as sources of hydride ions (H-) and sacrificial electron donors in their ground state. Here, we report the application HE a mediator [2π+2σ] cycloaddition bicyclo[1.1.0]butanes (BCBs) with alkenes under photo conditions. Through this strategy, various substituted bicyclo[2.1.1]hexanes can be efficiently prepared.
We report experimental investigations on the quantum phase transition between two opposite Hall plateaus of a anomalous insulator. observe well-defined plateau with zero conductivity over range magnetic field around coercivity when magnetization reverses. The features are shown to be closely related that effect, but its temperature evolution exhibits significant difference from network model for conventional transition. propose chiral edge states residing at domain boundaries, which unique...
With angle-resolved photoemission spectroscopy, gap opening is resolved at up to room temperature in the Dirac surface states of molecular beam epitaxy grown Cr-doped Bi2Se3 topological insulator films, which, however, show no long-range ferromagnetic order down 1.5 K. The size found decreasing with increasing electron-doping level. Scanning tunneling microscopy and first-principles calculations demonstrate that substitutional Cr atoms aggregate into superparamagnetic multimers matrix, which...
The differentiation between missing linker defects and cluster in MOFs is difficult, thereby limiting the ability to correlate materials properties a specific type of defects. Herein, we present novel easy synthesis strategy for creation solely "missing defects" by preparing mixed-metal (Zn, Zr)-UiO-66 followed gentle acid wash remove Zn nodes. resulting material has reo UiO-66 structure, typical well-defined clusters are thoroughly characterized, including low-pressure Ar-sorption,...
This review provides a detailed overview of the application MOFs and COFs for photocatalytic H 2 O production from and/or O.
ABSTRACT The intrinsic magnetic topological insulator MnBi2Te4 provides a feasible pathway to the high-temperature quantum anomalous Hall (QAH) effect as well various novel phases. Although quantized transport properties have been observed in exfoliated thin flakes, it remains big challenge achieve molecular beam epitaxy (MBE)-grown films even close regime. In this work, we report realization of resistivity MBE-grown with chemical potential tuned by both controlled situ oxygen exposure and...
Nuclear lamin B1 (LMNB1) is a member of the nuclear protein family. LMNB1 can maintain and ensure stability structure influence process cell senescence by regulating chromatin distribution, DNA replication transcription, gene expression, cycle, etc. In recent years, several studies have shown that abnormal expression LMNB1, classical biomarker senescence, highly correlated with progression various malignant tumors; therefore considered new potential tumor marker therapeutic target. However,...
Anderson localization, the absence of diffusive transport in disordered systems, has been manifested as hopping numerous electronic whereas recently discovered topological insulators it not directly observed. Here, we report experimental demonstration a crossover from weak antilocalization regime to variable range localization with ultrathin $({\mathrm{Bi}}_{1\ensuremath{-}x}{\mathrm{Sb}}_{x}{)}_{2}{\mathrm{Te}}_{3}$ films. As disorder becomes stronger, negative magnetoconductivity due is...
The evolution of the quantum anomalous Hall effect with thickness Cr-doped (Bi,Sb)2 Te3 magnetic topological insulator films is studied, revealing how caused by interplay surface states, band-bending, and ferromagnetic exchange energy. Homogeneity in ferromagnetism found to be key high-temperature material.
Abstract This paper applies panel data of 281 prefecture-level cities in China from 2004 to 2017 calculate the green total factor productivity (GTFP) at city level. Then, it examines influences various forms industrial agglomeration on GTFP and its two decomposition factors. The results demonstrate that manufacturing industry rather than producer services can effectively improve mainly through stimulating internal technological progress. However, collaborative has a significant positive...
Abstract Functionally graded ceramics (FGCs), which combine the properties of various composite ceramics, have been widely used in aerospace, armament, and other industries. One newest melt‐growth ceramic additive manufacturing techniques, laser directed energy deposition (LDED), enables creation gradient materials by controlling ratio powder delivery. Ceramic–ceramic type are subject fewer studies, majority LDED material systems now research metal–metal metal–ceramic materials. In this...
Defect engineering of metal–organic frameworks (MOFs) has already found applications in gas adsorption, storage, and heterogeneous catalysis. However, the role defects determining electrical, optical, mechanical properties MOFs is yet to be explored. Herein, we demonstrate white light emission two defect engineered (UiO-66 MIL-53(Al)) through encapsulation lanthanide ions (Eu3+ Tb3+). The sites are created by use a modulator (4-acetyl benzoic acid; AB) during synthesis MOFs. color...