Photoelectron Spectroscopy of MoS2 at the Sulfur 2p Absorption Edge
Abstract
The sulfur 2p absorption edge and valence band resonant photoelectron spectra of molybdenum disulfide (MoS2), obtained using synchrotron radiation, are compared to the Mo 4p edge results from previous work. A pre-edge feature in the S 2p data shows transitions to unoccupied, dominantly Mo 4d antibonding levels, indicating that significant covalent interactions exist between Mo and S valence orbitals. Resonant enhancement of valence band photoelectron shake-up peaks is observed at the S 2p -> Mo 4d excitation energies, while the sulfur L sub 2,3VV Auger peak dominates the spectrum when the S 2p ionization threshold is reached. Antiresonant intensity modulation of main valence band peaks is observed at photon energies corresponding to the S 2p -> Mo 4d pre-edge feature. The results show that the principal decay channel after the S 2p-> Mo 4d excitation leads to the enhancement of final states having S 3p sup 4 Mo 4d sup 3 electron configurations.... Photoelectron spectroscopy, Molybdenum disulfide, Solid lubricant, Resonant photoelectron spectroscopy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1992
- Accession Number
- ADA262589
Entities
People
- D. K. Shuh
- J. A. Yarmoff
- Jeffrey R. Lince
- Stephen V. Didziulis
- T. D. Durbin
Organizations
- The Aerospace Corporation