Interband dielectric function ofC60andM6C60(M=K,Rb,Cs)
| Autor: | Xiang-Xin Bi, G. T. Hager, S. L. Ren, Ying Wang, G. W. Lehman, P. C. Eklund, Apparao M. Rao, W. T. Lee, J.M. Holden |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | Physical Review B. 45:14396-14399 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.45.14396 |
| Popis: | We report the room-temperature optical properties of ${\mathrm{C}}_{60}$ and ${\mathit{M}}_{6}$${\mathrm{C}}_{60}$ determined from the near-normal-incidence reflection and transmission experiments. The observed peak positions in ${\mathrm{\ensuremath{\epsilon}}}_{2}$(\ensuremath{\omega}) for ${\mathrm{C}}_{60}$ and ${\mathit{M}}_{6}$${\mathrm{C}}_{60}$ compare well with recent band-structure calculations and suggest that the ${\mathit{M}}_{6}$${\mathrm{C}}_{60}$ compounds exhibit a weak hybridization between the ${\mathrm{C}}_{60}$ and M states, consistent with the Raman-scattering studies of ${\mathit{M}}_{6}$${\mathrm{C}}_{60}$. The onset of absorption across the energy gap between the highest occupied molecular orbital (MO) and the lowest unoccupied MO in ${\mathrm{C}}_{60}$ is measured to be 1.7 eV. |
| Databáze: | OpenAIRE |
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