Influence of exciton motion on the shape of optical absorption lines: Applications to vibrations at surfaces
- 15 August 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 34 (4) , 2266-2283
- https://doi.org/10.1103/physrevb.34.2266
Abstract
We present a detailed discussion about optical absorption and exciton motion in extended systems. The model considered consists of an ordered structure of molecules with arbitrary lateral interactions and a local process for phase relaxation. The model is solved accurately: The lateral interaction is treated by the use of the coherent-potential approximation, and a projection-operator formalism is used in treating the phase-relaxation process. The theory is in good agreement with infrared light-absorption data for CO adsorbed on Ni(111) and Ru(001).Keywords
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