Title of article :
Core-hole effect in the ELNES of α-Al2O3: experiment and theory
Author/Authors :
Nufer، نويسنده , , Stefan and Gemming، نويسنده , , Thomas and Elsنsser، نويسنده , , Christian and Kِstlmeier، نويسنده , , Sibylle and Rühle، نويسنده , , Manfred، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2001
Pages :
4
From page :
339
To page :
342
Abstract :
The occurrence of the core-hole effect at the Al-K and Al-L1 edge in α-Al2O3 was studied by comparing experimental electron energy-loss near-edge structures (ELNES) and results of band-structure calculations with and without accounting for core-hole effects by the Z+1 approximation. It was found that the theoretically calculated unoccupied p-like projected densities of states (PDOS) without Z+1 approximation matches better to the experimental Al-L1 ELNES, whereas the PDOS with Z+1 approximation matches better to the experimental Al-K ELNES. We conclude that the localisation of the initial state is an important prerequisite for the observability of the core-hole effect in the ELNES.
Keywords :
Scanning transmission electron microscope (STEM) , Inelastic electron scattering theory , Local density function theory (LDFT) , Ceramic materials , Electron energy-loss spectroscopy (EELS)
Journal title :
Ultramicroscopy
Serial Year :
2001
Journal title :
Ultramicroscopy
Record number :
2155597
Link To Document :
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