期刊
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
卷 143, 期 2-3, 页码 97-104出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elspec.2004.04.005
关键词
electron energy-loss spectroscopy; density-functional theory; plasmon; dielectric function; loss-function; interband transitions
类别
In the low-loss region of the electron energy-loss (EEL) spectrum interband transitions and plasmon losses are observed and can provide information about composition, electronic structure and optical properties. Low-loss EEL spectra have been calculated using density-functional theory (DFT) for a large number of elements and some simple compounds. Good agreement with experimental spectra is observed, allowing interpretation of the features in the spectrum. The calculations of the plasmon energies are improved over free-electron calculations for most materials. The improvements that have become available in the past few years, both in energy spectrometers and in the calculation methods, should see increasing numbers of applications of low-loss EELS to measure electronic structure and bonding. (c) 2004 Elsevier B.V. All rights reserved.
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