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Bound excitons and many-body effects in x-ray absorption spectra of azobenzene-functionalized self-assembled monolayers
- Source :
- Phys. Rev. B 92, 205105 (2015)
- 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.
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 92, 205105 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1508.01135
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.92.205105