Orientation Dependence of Core Edges in Electron-Energy-Loss Spectra from Anisotropic Materials

作者：Richard D. Leapman, J. Silcox · 发表于：Physical Review Letters · 年份：1979 · DOI：10.1103/physrevlett.42.1361 · 被引用次数：94 · 研究领域：Electron and X-Ray Spectroscopy Techniques、Graphene research and applications、Advanced Electron Microscopy Techniques and Applications

We have investigated the orientation dependence of the structure near the boron $K$ edge in electron-energy-loss spectra from hexagonal boron nitride. Angular distributions of spectra recorded from crystals with $c$ axis tilted at 45\ifmmode^\circ\else\textdegree\fi{} to the beam allow us to determine unambiguously the $\ensuremath{\pi}$ and $\ensuremath{\sigma}$ character of the final states at different energies. Results are in quantitative agreement with a model based on hydridized atomic orbitals.