A5101413424- Physics of Superconductivity and Magnetism
- Data Management and Algorithms
- Iron-based superconductors research
- Automated Road and Building Extraction
- Advanced Image and Video Retrieval Techniques
- Electronic and Structural Properties of Oxides
- Surface and Thin Film Phenomena
- Superconductivity in MgB2 and Alloys
- Data Mining Algorithms and Applications
- Video Surveillance and Tracking Methods
- Rare-earth and actinide compounds
Ningbo University
2020
Chinese Academy of Sciences
2011-2017
Institute of Physics
2011-2017
We have performed an angle-resolved photoemission spectroscopy study of the new iron-based superconductor ${\mathrm{K}}_{0.8}{\mathrm{Fe}}_{1.7}{\mathrm{Se}}_{2}$ (${T}_{c}\ensuremath{\sim}30\text{ }\text{ }\mathrm{K}$). Clear band dispersion is observed with overall bandwidth renormalized by a factor 2.5 compared to our local density approximation calculations, indicating relatively strong correlation effects. Only electronlike crosses Fermi energy, forming nearly circular surface (FS) at...
In order to improve the advantages and reliability of second derivative method in tracking position extrema from experimental curves, we develop a novel analysis based on mathematical concept curvature. We derive formulas for curvature one two dimensions demonstrate their applicability simulated angle-resolved photoemission spectroscopy data. As compared derivative, our new improves localization reduces peak broadness better visualization intensity image plots.
Abstract The origin of enhanced superconductivity over 50 K in the recently discovered FeSe monolayer films grown on SrTiO 3 (STO), as compared to 8 bulk FeSe, is intensely debated. As with ferrochalcogenides A x Fe 2− y Se 2 and potassium-doped which also have a relatively high-superconducting critical temperature ( T c ), Fermi surface (FS) FeSe/STO free hole-like FS, suggesting that Lifshitz transition by these hole FSs vanish may help increasing . However, fundamental reasons explaining...
In order to determine the orbital characters on various Fermi surface pockets of Fe-based superconductors Ba${}_{0.6}$K${}_{0.4}$Fe${}_{2}$As${}_{2}$ and FeSe${}_{0.45}$Te${}_{0.55}$, we introduce a method calculate photoemission matrix elements. We compare our simulations experimental data obtained with configurations beam orientation light polarization. show that intensity patterns revealed from angle-resolved spectroscopy measurements mappings energy-momentum plots along high-symmetry...
Summary Uncertain data is widely used in many practical applications, such as cleaning, location‐based services, privacy protection, and so on. With the development of technology, has a tendency to high‐dimensionality. The most common indexes for nearest neighbor search on uncertain are R‐Tree KD‐Tree. These will inevitably bring about “curse dimension.” Focus this problem, article proposes new hash algorithm, called LSR‐forest, which based locality sensitive hashing R‐Tree, solve...