The momentum transfer in electron-energy-loss spectra (EELS) recorded in an electron microscope can be controlled in a manner akin to polarization-dependent soft-x-ray absorption spectroscopy, however with much greater spatial resolution. Here we report orientation-dependent EELS from fine-grained MgB2 for both B K and Mg L2.3 edges. Calculations based on an excited final state are used to suggest an anisotropic exciton for the peak at 55 eV at the Mg L23 edge.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Nov 1 2002|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics