Interband

Used effects Phonon excitation (20 meV-1 eV) Plasmon and interband excitations (1-50 eV) Inner-shell ionization (A = ionization energy loss) Emission of x-ray (continuous/characteristic, analytical EM)... 

Logothetidis S, Aiouani M, Garriga M and Cardona M 1990 interband transitions in Ai Ga. As aiioys Phys. Rev. 

VEELS spectra are limited in practice to tbe relatively narrow energy range of about 30 eV over wbicb plasmons or interband transitions can occur. In contrast to AES, XPS, or even CEELS, where excitations can occur over hundreds of eV, the probability of spectral overlap is much higher for VEELS. It is fortunate that most... 

Sometimes it is possible to distinguish surface and bulk plasmons by lowering Eq so that the bulk plasmon will decrease in intensity more rapidly than the surface plasmon. However both surface states and interband transitions can show the same behavior. 

C. J. Powell. Opt. Soc. Amer. 59, 738, 1969. Excellent presentation of the interaction between interband and plasmon peaks that is often overlooked in REELS spectral analysis. 

H. RAETHERin Exeitations of Plasmons and Interband Transitions by Electrons, Springer-Verlag, Berlin-Heidelberg-New York, 1980. 

Linear absorption measurements can therefore give the first indication of possible alloy formation. Nevertheless, in systems containing transition metals (Pd-Ag, Co-Ni,. ..) such a simple technique is no longer effective as interband transitions completely mask the SPR peak, resulting in a structurless absorption, which hinders any unambiguous identification of the alloy. In such cases, one has to rely on structural techniques like TEM (selected-area electron diffraction, SAED and energy-dispersive X-ray spectroscopy, EDS) or EXAFS (extended X-ray absorption fine structure) to establish alloy formation. 

Whelan, M.J. (1965) Inelastic scattering of fast electrons by crystals - I. Interband excitations, Applied Phys., 36, 2099-2103. 

Although the conductivity of polyacetylene is generally discussed in terms of solitons, the question of the precise nature of the major charge-carriers continues to be a subject of debate, with conflicting evidence from different experiments. Spectro-electrochemical studies provide evidence that the charge in doped polyacetylene is stored in soliton-like species (although this is not the only possible interpretation [142, 143]), with absorptions in the optical spectra corresponding to transitions to states located at mid-gap [24,89, 119]. The intensity of the interband transitions... 

The background dielectric constant e for the metal arises from the polarizability of the ion cores and the contribution of interband transitions.11 For mercury and other simple metals, with a large band gap and relatively unpolarizable ion cores, one expects a background dielectric constant close to unity. With e = 1 and n°° = 8.17 x 1022 cm-3 (mercury), the capacitance per unit area is... 

John O. Dimmock, Introduction to the Theory of Exciton States in Semiconductors B. Lax and J. G. Mavroides, Interband Magnetooptical Effects... 

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