Dispersion relations of elementary excitations when damping is present | Zendy

Ritchie R. H. | Zendy; Hamm R. N. | Zendy; Williams M. W. | Zendy; Arakawa E. T. | Zendy

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Dispersion relations of elementary excitations when damping is present

Author(s) -

Ritchie R. H.,

Hamm R. N.,

Williams M. W.,

Arakawa E. T.

Publication year - 1977

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220840139

Subject(s) - dispersion relation , dispersion (optics) , surface plasmon , excitation , momentum (technical analysis) , plasmon , condensed matter physics , dielectric , foil method , materials science , physics , optics , quantum mechanics , composite material , finance , economics

Dispersion relations of elementary excitations in solids when appreciable damping occurs are discussed. It is shown that in order to establish a dispersion relation from experiment it is necessary to specify how the experiment was performed; different experiments may lead to different dispersion relations even when a single kind of elementary excitation is involved. “Momentum‐fixed” dispersion relations and “energy‐fixed” dispersion relations are discussed for the surface plasmon at a single isolated metal‐vacuum interface and for the surface plasmon at the metal‐vacuum interface of a thin metal foil bounded by a transparent dielectric on one side and by vacuum on the other.

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