A5054668656- Topological Materials and Phenomena
- 2D Materials and Applications
- Laser-Matter Interactions and Applications
- Iron-based superconductors research
- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
The small time gaps of synchrotron radiation in conventional multi-bunch mode (100-500 MHz) or laser-based sources with high pulse rate (∼80 are prohibitive for time-of-flight (ToF) based photoelectron spectroscopy. Detectors resolution the 100 ps range yield only 20-100 resolved slices within gap. Here we present two techniques implementing efficient ToF recording at repetition rate. A fast electron-optical beam blanking unit GHz bandwidth, integrated a momentum microscope, allows...
We have determined the quasiparticle dispersion for semimetallic $1\mathit{T}\text{\ensuremath{-}}{\mathrm{TiTe}}_{2}$ at 20 K using time-of-flight momentum microscopy with tunable soft-x-ray excitation and high-resolution 6.4 eV ultraviolet excitation. In particular, we studied interactions of electronic states Te $5p$--hole pockets high Fermi velocity near $\mathrm{\ensuremath{\Gamma}}$ point. Kinks in otherwise parabolic dispersions suggest onset many-body a binding energy about 30 meV....