Landolt-Börnstein - Group III Condensed Matter

6.2.2.3 Insulators and oxides

Abstract

This chapter provides information on inelastic scattering of electrons in insulators and oxides. Insulators may be studied by electron energy loss spectrum (EELS) at primary energies for which the secondary electron yield is unitary or by neutralizing the sample by flooding it with an auxiliary electron gun. An electronic transition is present at ≈4 eV loss energy on (1100) surface which shows a strong azimuthal anisotropy. The measured and calculated frequencies of the Fuchs-Kliewer phonons of various intrinsic materials are tabulated. Surface and superconducting properties of superconducting oxides were studied with low energy EELS on YBa2Cu3O7 and Bi2Sr2CaCu2O8 single crystals cleaved under vacuum. On YBa2Cu3O7 a loss feature associated with the energy gap was observed. On Bi2Sr2CaCu2O8 two modes were observed at 51 meV and 81 meV on low conductivity areas. EEL-spectra and probability of n-phonon excitation of ZnO(1100) is illustrated. Loss probability for the surface phonon on MgO(001) is figured out. HREEL-spectra for Bi2Sr2CaCu2O8 and YBa2Cu3O7 are shown.

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Title
6.2.2.3 Insulators and oxides
Book Title
Interaction of Charged Particles and Atoms with Surfaces
In
6.2.2 Data
Book DOI
10.1007/b87125
Chapter DOI
10.1007/10086066_37
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
24C
Editors
  • G. Chiarotti
  • Authors
  • M. Rocca
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