Abstract
Electronic excitations at the boundary of metallic systems are of interest from a fundamental and practical point of view. These excitations comprise a class of states of the interacting electron gas that differ greatly from those in purely two- or three-dimensional systems. The theoretical understanding of these modes and the identification of those surface parameters that govern their spectral characteristics have been important topics in surface physics for a long time. Surface spectroscopies employing electrons, photons, atoms, or ions invariably involve some type of single-particle or collective electronic excitation. How these external probes couple to the surface modes, and what can be learned from this interaction about the state of the surface, is therefore relevant for many investigations in surface physics.
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Liebsch, A. (1997). Introduction. In: Electronic Excitations at Metal Surfaces. Physics of Solids and Liquids. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-5107-9_1
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DOI: https://doi.org/10.1007/978-1-4757-5107-9_1
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