On the validity of the Čerenkov limit as a criterion for precise band gap measurements by VEELS.

@article{Erni2016OnTV,
  title={On the validity of the {\vC}erenkov limit as a criterion for precise band gap measurements by VEELS.},
  author={Rolf Erni},
  journal={Ultramicroscopy},
  year={2016},
  volume={160},
  pages={
          80-83
        }
}
The generation of Čerenkov photons, contributions from retardation and surface effects, and the excitation of guided light modes can complicate the analysis of valence electron energy-loss spectroscopy (VEELS) data. In recent works it was argued that working below the so-called Čerenkov limit unwanted spectral contributions can be avoided, simplifying the reliable measurement of band gap energies and the extraction of the dielectric function by the Kramers-Kronig analysis. Here, relativistic… CONTINUE READING