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Giant plasmon excitation in freeC60andC70molecules studied by photoionization
Abstract
Single-photon ionization of ${\mathrm{C}}_{60}$ and ${\mathrm{C}}_{70}$ has been studied using synchrotron radiation in an energy range from the ionization potential (7.54\ifmmode\pm\else\textpm\fi{}0.04 eV for ${\mathrm{C}}_{60}$ 7.3\ifmmode\pm\else\textpm\fi{}0.2 eV for ${\mathrm{C}}_{70}$) up to 35 eV. The photoion yield is dominated by a strong resonance at about 20 eV with a FWHM of \ensuremath{\sim}10 eV. We interpret this as being due to autoionization via the giant plasmon resonance recently predicted in the RPA approximation. ${\mathrm{C}}_{60}$ and ${\mathrm{C}}_{70}$ offer the unique possibility for a quantitative comparison of this collective excitation in the free molecule with that observed in the solid phase by electron-energy-loss spectroscopy at about 28 eV.
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Cited by
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Metadata
- Authors
- Hertel, I. V., Steger, H., de Vries, J., Weisser, B., Menzel, C., Kamke, B., & Kamke, W.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1992-02-10
- Volume
- 68
- Issue
- 6
- Pages
- 784-787
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W2050469399
- Cited by
- 390
- References
- 0
- FWCI
- 32.33
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Giant plasmon excitation in freeC60andC70molecules studied by photoionization. https://app.cochat.ai/papers/10.1103/physrevlett.68.784
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- Hertel, I. V., Steger, H., de Vries, J., Weisser, B., Menzel, C., Kamke, B., & Kamke, W. (1992). Giant plasmon excitation in freeC60andC70molecules studied by photoionization. Physical Review Letters. https://doi.org/10.1103/physrevlett.68.784
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