Excitonic effects and the optical absorption spectrum ofhydrogenated Si clusters
Journal Article
·
· Physical Review Letters
OSTI ID:878518
We calculate the optical absorption spectrum of hydrogen-terminated silicon clusters by solving the Bethe-Salpeter equation for the two-particle Green's function using an ab initio approach. The one-particle Green's function and the electron-hole interaction kernel are calculated within the GW approximation for the electron self-energy operator. Very large exciton binding energies are observed. Our results for the one-particle properties and the optical absorption spectra of the clusters are in very good agreement with available experimental data.
- Research Organization:
- Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director. Office of Energy Research. Office of BasicEnergy Sciences, Materials Sciences Division; National Science FoundationGrant DMR-9520554; Deutsche Forschungsgemeinschaft GrantRo-1318/1-1
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 878518
- Report Number(s):
- LBNL--48769; BnR: KC0202030
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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