A5100649474- Topological Materials and Phenomena
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Semiconductor materials and devices
- Graphene research and applications
- Quantum and electron transport phenomena
- Advanced Memory and Neural Computing
- Thin-Film Transistor Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Nanowire Synthesis and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor materials and interfaces
- Advanced Thermoelectric Materials and Devices
- Physics of Superconductivity and Magnetism
- Diamond and Carbon-based Materials Research
- Iron-based superconductors research
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Low-power high-performance VLSI design
- Phase Equilibria and Thermodynamics
- Error Correcting Code Techniques
- Spaceflight effects on biology
- Quantum Mechanics and Non-Hermitian Physics
- Transition Metal Oxide Nanomaterials
- Advanced Polymer Synthesis and Characterization
Peking University
2018-2024
Hubei University
2023
Centre National de la Recherche Scientifique
2023
Donghua University
2022-2023
École Normale Supérieure Paris-Saclay
2023
State Key Laboratory of Optoelectronic Materials and Technology
2023
Sun Yat-sen University
2023
University of Science and Technology Beijing
2023
Université Paris-Saclay
2023
Institute of Microelectronics
2020-2021
Weyl semimetals host a variety of exotic effects that have no counterpart in conventional materials, such as the chiral anomaly and magnetic monopole momentum space. These give rise to unusual transport properties, including negative magnetoresistance planar Hall effect, etc. Here, we report new type effect semimetal. Unlike antisymmetric (with respect either field or magnetization) symmetric discovered are both magnetization. We show Berry curvature, tilt node, synergically produce these...
Significance Topological materials exhibit a nontrivial Berry phase, experimental determination of which heavily relies on straightforward phase analysis quantum oscillations. We report the observation striking spin-zero effect in oscillations topological materials. The concomitant inversion underlines largely overlooked factor previous oscillation Moreover, our results indicate that <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi...
Neuromorphic computing has emerged as the high-energy-efficiency and intelligent solution for processing sensory data. As a potential alternative to neuromorphic computing, photo-excited synaptic systems can integrate functions of optoelectronic sensing realize low-power high-performance visual perception. However, one major challenge in high-efficient system is complementarily enhanced inhibited behaviors with small hardware cost possible. Another fabricate photo-synapse devices...
Organic electrochemical transistors (OECTs) for skin-like bioelectronics require mechanical stretchability, softness, and cost-effective large-scale manufacturing. However, developing intrinsically stretchable OECTs using a simple fast-response technique is challenging due to limitations in functional materials, substrate wettability, integrated processing of multiple materials. In this regard, we propose fabrication method devised by combining the preparation microstructured hydrophilic...
Abstract Three‐dimensional stacked transistors based on Si/SiGe heterojunction are a potential candidate for future low‐power and high‐performance computing in integrated circuits. Observing accurately measuring strain heterojunctions is critical to increasing carrier mobility improving device performance. Transmission electron microscopy (TEM) with high spatial resolution analytical capabilities provides technical support atomic‐scale measurement promotes significant progress mapping...
Abstract The thermoelectric Hall effect is the generation of a transverse heat current upon applying an electric field in presence magnetic field. Here, we demonstrate that conductivity α x y three-dimensional Dirac semimetal ZrTe 5 acquires robust plateau extreme quantum limit value independent strength, disorder carrier concentration, or sign. We explain this theoretically and show it unique signature Weyl electrons limit. further find other coefficients, such as thermopower Nernst...
We study the axis transport of WTe2. An enhancement quantum oscillations allows for observation an astonishing spin zero effect at certain field orientations both hole bands and electron bands, providing evidence their spin–orbit splitting origin. Based on requirements effect, a lower limit Landé g-factor, as large 44.7, has been obtained angle 63.7° with respect to c towards b band. The dependence band is experimentally determined.
Tilting the Weyl cone breaks Lorentz invariance and enriches physics. Here, we report observation of a magnetic-field-antisymmetric Seebeck effect in tilted semimetal, ${\mathrm{Co}}_{3}{\mathrm{Sn}}_{2}{\mathrm{S}}_{2}$. Moreover, it is found that Nernst are antisymmetric both in-plane magnetic field magnetization. We attribute these exotic effects to one-dimensional chiral anomaly phase space correction due Berry curvature. The further reproduced by theoretical calculation, taking into...
Extensive studies of electron transport in Dirac materials have shown positive magneto-resistance (MR) and magneto-thermopower (MTP) a magnetic field perpendicular to the excitation current or thermal gradient. In contrast, measurements often show negative longitudinal MR MTP for oriented along gradient; this is attributed chiral anomaly materials. Here, we report very different magneto-thermoelectric behavior massive material ZrTe5. Although thin flakes commonly observed field, distinct...
Posttranslational modification of tubulin increases the dynamic complexity and functional diversity microtubules. Acetylation α-tubulin at Lys-40 is a highly conserved posttranslational that has been shown to improve flexibility resilience Here we studied in vivo functions acetylation by knocking-out Atat, Drosophila acetyltransferase, mutating Arg α1-tubulin. We found reduction dendritic arborization larval class I (da) neurons both mutants. The developmental defects atat mutants could be...
The competition between crystallization and oiling-out is a major concern in the process design of antisolvent for poorly water-soluble drugs. Within CALPHAD framework, this study demonstrates extrapolation ternary phase diagram from solubility data, resorting to Jouyban–Acree model Gibbs–Helmholtz-type equation. DBDCS (a fluorophore exhibiting aggregation-induced emission) water–[1,4-dioxane] constructed by calculating polymorph solid–liquid equilibria, metastable liquid–liquid equilibrium,...
The Onsager-Casimir reciprocal relations are a fundamental symmetry of nonequilibrium statistical systems. Here we study an unusual chirality-dependent Hall effect in tilted Weyl semimetal Co$_3$Sn$_2$S$_2$ with broken time reversal symmetry. It is confirmed that the satisfied. Since two Berry curvature effects, anomalous velocity and chiral chemical potential, contribute to observed effect, suggest their intriguing connection.
The ablation mechanism and performance of carbon fiber (CF)-reinforced poly aryl ether ketone (PAEK) thermoplastic composites were studied in this paper. results show that the damaged area is controlled by irradiation energy, while mass loss rate power density. In center, PAEK resin CFs underwent decomposition sublimation an anaerobic environment. transition zone, experienced remelting aerobic environment, massive char leaves present cross section. heat-affected only was observed. fusion...
Transparent conductive IWO/Cu/IWO (W-doped In2O3) films were deposited on quartz substrates by magnetron sputtering of IWO and Cu in the Ar atmosphere. The X-ray diffraction (XRD) patterns identified cubic iron–manganese ore crystal structure layers. influence thickness intermediate ultra-thin layers optical electrical properties multilayer was analyzed. As layer increases from 4 to 10 nm, resistivity gradually decreases 4.5 × 10−4 Ω·cm, transmittance mid-infrared range first then with a...
The quality of a superconductor–normal metal–superconductor Josephson junction (JJ) depends crucially on the transparency metal (S/N) interface. We demonstrate technique for fabricating planar JJs with perfect S/N interfaces. utilizes strong inverse proximity effect discovered in Al/V5S8 bilayers, by which Al layer is driven into resistive state. highly transparent homointerface and peculiar normal enable flow supercurrent across 2.9 μm long weak link. Moreover, our JJ exhibits giant...
In this paper, a TCAD simulation study of strain engineering in vertical channel gate-all-around (VCG) devices is presented. A replacement-metal-gate (RMG) process proposed to fabricate the on conventional CMOS platform. With careful calibration initial stress distribution molecular beam epitaxy grown supper lattice by Raman spectrum, evolution model VCG established. results show that asymmetric and bottom-up device paradigms strongly affect redistribution during fabrication as well stressor...
Few-layer ${\mathrm{WTe}}_{2}$ displays fascinating phenomena, which are believed to be closely related the topological character of its band structure. In this work we investigate quantum oscillations thermopower in thin films. Besides four oscillation frequencies commonly observed bulk materials, observe an additional frequency, has previously been attributed surface states [Nat. Commun. 8, 2150 (2017)]. Through analysis temperature, angular, and film thickness dependence conclude that it...
Abstract In this paper, the stress relaxation behavior of Q235 with initial tensile 70, 85 and 100 MPa were investigated at different temperature. Based on thermal activation theory, model steel was established, physical mechanism deformation process in revealed. The results shows that increase temperature or stress, nominal volume decreases, but strain rate sensitivity coefficient increase. repeated test release amount decreases number cycles, higher temperature, smaller effect cycles....
Introduction of spin-orbit coupling (SOC) in a Josephson junction (JJ) gives rise to unusual effects. We investigate JJs based on newly discovered heterodimensional superlattice V$_5$S$_8$ with special form SOC. The unique homointerface our enables elimination extrinsic effects due interfaces and disorder. observe asymmetric Fraunhofer patterns respect both the perpendicular magnetic field current. asymmetry is influenced by an in-plane field. Analysis pattern points nontrivial spatial...
Low-voltage multi-level non-volatile memory has been extensively desired to satisfy the need of data center and neuromorphic artificial intelligent computing. In this work, n <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$-\text{Si}/\text{Al}_{2}\mathrm{O}_{3}/\text{TiN}/\text{Al}_{2}\mathrm{O}_{3}/\text{TiN} /\text{Al}_{2}\mathrm{O}_{3}/\text{TiN}$</tex> stack is proposed represent potential low-voltage computing application. It features dual...
In this letter, high-performance p-type nanowire field-effect transistors (NWFETs) with nearly single-crystalline Si channels were fabricated. By NiSi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> seed-initiated lateral epitaxial crystallization, a large region up to 2 μm × 24 has been obtained CMOS-compatible process. Furthermore, utilizing the asymmetrical seed window design, 20 nm-wide was formed in active area, followed by feasible...