Interpretation of Auger Lineshapes on Systems with Half-Filled Valence Bands.
Abstract
The C KVV Auger lineshapes of benzene and diamond are interpreted in terms of a initial state rule, which is valid when the relevant valence band is half or less than half filled. The pi bands of benzene, are half-filled in the initial state. The (111) (2x1) surface of diamond reconstructs according to Pandey's pi-bonded chain model, so it too has an initially half filled pi bond. Initial state correlation of the pi electrons introduces significant lineshape and intensity changes, which can be interpreted in terms of a negative Delta U in the cini expression. This is in contrast to a positive Delta for Auger final state hole-hole correlations in nearly filled band systems. Direct evidence is obtained from the Auger lineshape for antiferrmagnetic spin ordering within the pi-bonded chains on the diamond surface. Application of this theory to lineshapes for the transition metals is also considered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA176039
Entities
People
- David E. Ramaker
- F. L. Hutson
Organizations
- George Washington University