Retrieving the dielectric function of diamond from valence electron energy-loss spectroscopy

Journal Article · Thu May 15 00:00:00 EDT 2008 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.77.195119· OSTI ID:21143546

Zhang, L; Verbeeck, J; Tendeloo, G van ^[1]; Erni, R ^[2]

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1. EMAT, University of Antwerp, Groenenborgerlaan 171, B2020 Antwerp (Belgium)
2. National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720 (United States)

A data-acquisition and data-processing method is proposed that aims at minimizing the effect of retardation on the Kramers-Kronig analysis of valence electron energy-loss spectra. This method is applied to diamond, which, due to its high dielectric constant, is a material that shows strong retardation effects and thus is a challenging material to be studied by valence electron energy-loss spectroscopy. The results obtained show a significant improvement but still show small discrepancies with respect to optical data, which are most likely due to the residual retardation contributions and the fact that nonzero momentum transfers are measured.

• OSTI ID: 21143546
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 77, Issue 19; Other Information: DOI: 10.1103/PhysRevB.77.195119; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIAMONDS
DIELECTRIC MATERIALS
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
KRAMERS-KRONIG CORRELATION
MOMENTUM TRANSFER
PERMITTIVITY
SEMICONDUCTOR MATERIALS
VALENCE