Anisotropic excitons in MgB2 from orientation-dependent electron-energy-loss spectroscopy

Nan Jiang, Bin Jiang, John Spence, R. C. Yu, S. C. Li, C. Q. Jin

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

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 languageEnglish (US)
Article number172502
Pages (from-to)1725021-1725024
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number17
StatePublished - Nov 1 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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