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Combination Law for Drude–Sommerfeld's Electron Damping in Multilayer Thin Metal Films (CROSBI ID 256215)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Mezzasalma, Stefano A. ; Janicki, Vesna ; Salamon, Krešimir ; Sancho-Parramon, Jordi ; Combination Law for Drude–Sommerfeld's Electron Damping in Multilayer Thin Metal Films // Physica status solidi. Rapid research letters, 12 (2018), 9; 1800149, 6. doi: 10.1002/pssr.201800149

Podaci o odgovornosti

Mezzasalma, Stefano A. ; Janicki, Vesna ; Salamon, Krešimir ; Sancho-Parramon, Jordi ;

engleski

Combination Law for Drude–Sommerfeld's Electron Damping in Multilayer Thin Metal Films

A combination rule for electron damping in multilayer thin metal films is derived from a mean‐field picture and is applied to optical experimental data. The overall coefficient obeys a parallel law of pure materials damping, chemical specificity being involved by averaging over densities of low energy states in the free electron model. Geometric and static electromagnetic features of single layers couple via small Fermi's energy fractions (α). An application is developed for thin Cu/Au and Au/Ag films, showing an apparently irregular damping trend in the film thickness (d = 2.5–7.5 nm). The inferred ⟨γ⟩'s agree in both cases with our data when |α| = 0.01 ÷ 0.001 linearly increases with decreasing d, suggesting a coupling phenomenology that can bring new insights in the optics and plasmonics of nanostructures.

electron damping ; multilayer ; Drude-Sommerfeld model ; ellipsometry ; dielectric function

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Podaci o izdanju

12 (9)

2018.

1800149

6

objavljeno

1862-6254

1862-6270

10.1002/pssr.201800149

Povezanost rada

Fizika

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