Local field at an irradiated adatom on jellium—exact microscopic results
- 15 October 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 22 (8), 3654-3668
- https://doi.org/10.1103/physrevb.22.3654
Abstract
The first microscopic correction to the image theory of the local field at an irradiated adatom has been calculated in the limit that the adatom is far from a jellium surface. The result of the calculation is the frequency-dependent position of the effective image plane in terms of the properties of semi-infinite jellium. The image plane position is found to be a complex number, reflecting the fact that the response of the surface electrons is lossy. Numerical calculations for jellium suggest that the imaginary component of the image plane position is large enough to prevent large image enhancement of the local field at an adatom, casting doubt on the idea that such enhancement is responsible for the recently observed surface-enhanced Raman effect.
Keywords
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