Effect of hole-induced shakedown in the Auger spectrum of lanthanum
It is shown from the M/sub 4,5/N/sub 4,5/X (X = O/sub 1/,O/sub 2,3/,N/sub 6,7/) Auger emissions of La metal, La/sub 2/O/sub 3/, and LaF/sub 3/ that the 4f hole pulled down below the Fermi level by the 3d core hole in La metal is significantly populated before Auger decays take place. This extra relaxation mechanism by the N/sub 4,5/VV Auger process from conduction electrons gives important contribution to the intensity of the M/sub 4,5/N/sub 4,5/N/sub 6,7/ Auger emission. The amount of this contribution can be calculated by existing theories on the shakeup or shakedown satellites on the La 3d core-level x-ray photoemission spectra (XPS) of these La compounds, and the results are found to be consistent with our experimental data. The criterion for the importance of this hole-induced shakedown process in the initial state of Auger spectra is determined, and the implications of this finding on other spectroscopies are discussed.
- Research Organization:
- Department of Physics, Seoul National University, Seoul 151, Korea
- OSTI ID:
- 5370501
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:11; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
AUGER ELECTRON SPECTROSCOPY
CHALCOGENIDES
ELECTRON SPECTROSCOPY
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HOLES
LANTHANUM
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
LANTHANUM OXIDES
METALS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
RARE EARTHS
SPECTROSCOPY