A5100462361- Graphene research and applications
- Quantum and electron transport phenomena
- Machine Learning in Materials Science
- CCD and CMOS Imaging Sensors
- Topological Materials and Phenomena
- Thermal properties of materials
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Advanced Optical Sensing Technologies
- ZnO doping and properties
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Terahertz technology and applications
- X-ray Diffraction in Crystallography
- Electronic and Structural Properties of Oxides
- Layered Double Hydroxides Synthesis and Applications
- Nuclear Materials and Properties
- Plasmonic and Surface Plasmon Research
- Optical Imaging and Spectroscopy Techniques
- Advanced ceramic materials synthesis
- High Temperature Alloys and Creep
- Economic and Technological Innovation
- Magnesium Oxide Properties and Applications
- Optical Polarization and Ellipsometry
China General Nuclear Power Corporation (China)
2023
Collaborative Innovation Center of Advanced Microstructures
2023
Nanjing University
2023
University of Michigan–Ann Arbor
2019-2022
Shenzhen University
2022
Tongji University
2021
Northwestern Polytechnical University
2021
University of Hawaiʻi at Mānoa
2020
University of Hawaii System
2020
Chinese Academy of Sciences
2016-2019
The transport and optical properties of Nb-doped $\mathrm{Cs}({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Nb}}_{x}$)${}_{3}{\mathrm{Sb}}_{5}$ with $x=0.03$ 0.07 have been investigated compared those undoped ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$. Upon Nb doping, the charge density wave (CDW) transition temperature ${T}_{\text{CDW}}$ is suppressed, superconducting ${T}_{c}$ rises. residual resistivity ratio decreases suggesting an increase disorder. For all compounds, conductivity in pristine...
Recent years have seen the rapid growth of new approaches to optical imaging, with an emphasis on extracting three-dimensional (3D) information from what is normally a two-dimensional (2D) image capture. Perhaps most importantly, rise computational imaging enables both physical layouts components and algorithms be implemented. This paper concerns convergence two advances: development transparent focal stack system using graphene photodetector arrays, expansion capabilities machine learning...
The RKKY interaction between two magnetic impurities absorbed on the surface layer of half-filled AB-stacked multilayer graphene (ABSMLG) is theoretically studied based lattice Green's function technique. In comparison with case monolayer graphene, in such presents distinct properties some aspects. Firstly, from numerical results, we find that thickness ABSMLG influences a complicated manner, depending odd/even parity number layers and sublattice attribution positions impurities. Then,...
Recent discovery of superconductivity in the twisted bilayer graphene has stimulated numerous theoretical proposals concerning its exact gap symmetry. Among them, $d+id$ or $p+ip$-wave were believed to be most plausible solutions. Here considering emerges near a correlated insulating state and may induced by antiferromagnetic spin fluctuations, we apply strong-coupling Eliashberg theory with both inter- intraband quantum critical pairing interactions discuss possible symmetry an effective...
Abstract Semiconductor photoconductive switches are useful and versatile emitters of terahertz (THz) radiation with a broad range applications in THz imaging time-domain spectroscopy. One fundamental challenge for achieving efficient ultrafast switching, however, is the relatively long carrier lifetime most common semiconductors. To obtain picosecond pulses, especially when coupled waveguides/transmission lines, semiconductors typically engineered high defect density to reduce lifetimes,...
Spatial atomic layer deposition (ALD) of intrinsic zinc oxide (i-ZnO) films is scaled up from the laboratory to industrial level, and film properties are investigated in detail. A high growth rate 35 nm/min achieved. The deposited transparent have an unusually resistivity about 100 Ω · cm. This attributed extremely short precursor exposure purge duration spatial ALD (~8 ms), as compared with temporal (~1-10 s). highly crystalline nearly stoichiometric i-ZnO makes these layers ideal for...
We study the interlayer charge transfer dynamics across heterojunction of graphene and chemical-vapor-deposition grown MoS2, using ultrafast optical spectroscopy. Electron–hole pairs are generated only in layer by a 100-fs pump pulse, presence carriers MoS2 is observed via probe pulse tuned to bandgap. Due band lineup, there an initial rapid electrons from into layer, which cannot be well resolved within resolution experiment. This work focuses instead on thermalized back as system returns...
Nearly all existing direct current (DC) chemical vapor sensing methodologies are based on charge transfer between sensor and adsorbed molecules. However, the high binding energy at charge-trapped sites, which is critical for sensitivity, significantly slows sensors' responses makes detection of nonpolar molecules difficult. Herein, by exploiting incomplete screening effect graphene, we demonstrate a DC graphene electronic rapid (subsecond) sensitive (ppb) broad range analytes, including...
The concept of geometry works as an overarching framework underlying a wide range transport phenomena. Particularly, the geometric phase effect in classical and quantum heat pump has been attracting much attention microscopic systems. Here, we formulate theoretically macroscopic driven diffusive Upon modulation protocols, nontrivial curvature parameter space universally induces additional pumped heat, beyond constraint hot-to-cold flowing. Furthermore, set up minimum experiment indeed...
Abstract Recent years have seen the rapid growth of new approaches to optical imaging, with an emphasis on extracting three-dimensional (3D) information from what is normally a two-dimensional (2D) image capture. Perhaps most importantly, rise computational defined as synergistic design systems in conjunction reconstruction algorithms, enables both physical layouts components and algorithms be implemented. This paper concerns convergence two advances: development transparent photodetectors...
Ultra-thin polymeric dielectrics are of great interest for the ever-increasing development high-performance novel electronics. Up to date, fabrication polymer layers as thin few nanometers is still an extremely demanding process. Here, we report a facile method fabricate molecularly (4 nm–5 nm) plasma-hardened photoresist (PHPR) by applying O2 plasma treat surface (SPR 220) cross-link constituent novolac resin. It found that such ultra-thin PHPR also possess molecular-scale smoothness,...
X-ray diffraction (XRD) data acquisition and analysis is among the most time-consuming steps in development cycle of novel thin-film materials. We propose a machine-learning-enabled approach to predict crystallographic dimensionality space group from limited number XRD patterns. overcome scarce-data problem intrinsic materials by coupling supervised machine learning with model agnostic, physics-informed augmentation strategy using simulated Inorganic Crystal Structure Database (ICSD)...
We report a transparent photodetector array using graphene as both the active pixel and interconnect material. demonstrate imaging at multiple focal planes with these arrays. Further applications of position tracing will also be discussed. © 2019 The Author(s)
While machine learning (ML) in experimental research has demonstrated impressive predictive capabilities, inductive reasoning and knowledge extraction remain elusive tasks, part because of the difficulty extracting fungible representations from data. In this manuscript, we use ML to infer underlying dynamical differential equation (DE) data degrading organic-inorganic methylammonium lead iodide (MAPI) perovskite thin films under environmental stressors (elevated temperature, humidity,...
Abstract The diagonal and Hall conductivities of graphene arising from the spin-orbit coupling impurity scattering are theoretically studied. Based on continuous model, i.e. massless Dirac equation, we derive analytical expressions conductivity tensor both Kubo Boltzmann transport theories. By performing numerical calculations, find that quantum result within self-consistent Born approximation exhibits an insulating gap around point. And in this a well-defined quantized spin plateau occurs....
We report a THz emitter based on simple metal-graphene-silicon heterostructure, and demonstrate an enhancement of the amplitude by factor 80 over its graphene-free counterpart with no tradeoff in bandwidth or SNR. The is due to increased carrier collection efficiency graphene layer.