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Core excitons and vibronic coupling in diamond and graphite
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
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1993 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 71, no 22, 3725-3728 p.Article in journal (Refereed) Published
Abstract [en]

The C 1s exciton in diamond is studied by soft x-ray emission excited with high resolution monochromatic photons. A strong phonon sideband of 5 eV wide is observed in the exciton recombination spectrum. With the phonon contribution, the exciton binding energy is estimated to be 1.5 eV. The excited atom is suggested to undergo Jahn-Teller relaxation similar to that of the nitrogen impurities in diamond. A similar exciton is observed at the sigma*-band threshold in graphite. These results provide new insights to the understanding of the core exciton and the donor problem in diamond and other systems.

Place, publisher, year, edition, pages
1993. Vol. 71, no 22, 3725-3728 p.
Keyword [en]
ABSORPTION FINE-STRUCTURE, SELF-TRAPPED-EXCITON, PHONON RELAXATION, RAY, SCATTERING, SPECTRA, EDGE
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-2142Local ID: 1217OAI: oai:DiVA.org:miun-2142DiVA: diva2:27174
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved

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