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Bound excitons and many-body effects in x-ray absorption spectra of azobenzene-functionalized self-assembled monolayers.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Nov2015, Vol. 92 Issue 20, p205105-1-205105-7. 7p. - Publication Year :
- 2015
-
Abstract
- We study x-ray absorption spectra of azobenzene-functionalized self-assembled monolayers (SAMs), investigating excitations from the nitrogen K edge. Azobenzene with H-termination and functionalized with CF3 groups is considered. The Bethe-Salpeter equation is employed to compute the spectra, including excitonic effects, and to determine the character of the near-edge resonances. Our results indicate that core-edge excitations are intense and strongly bound: their binding energies range from about 6 to 4 eV, going from isolated molecules to densely-packed SAMs. Electron-hole correlation rules these excitations, while the exchange interaction plays a negligible role. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AZOBENZENE
*ABSORPTION spectra
*AZO compounds
*RADIATIVE transfer
*X-rays
Subjects
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 92
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 112371126
- Full Text :
- https://doi.org/10.1103/PhysRevB.92.205105