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- W2762955128 abstract "Random impedance networks are widely used as a model to describe plasmon resonances in disordered metal-dielectric nanocomposites. In order to study thin films, two-dimensional networks are often used despite the fact that such networks correspond to a two-dimensional electrodynamics [J.P. Clerc et al, J. Phys. A 29, 4781 (1996)]. In the present work, we propose a model of two-dimensional systems with three-dimensional Coulomb interaction and show that this model is equivalent to a planar network with long-range capacitive connections between sites. In a case of a metal film, we get a known dispersion $omega propto sqrt{k}$ of plane-wave two-dimensional plasmons. In the framework of the proposed model, we study the evolution of resonances with decreasing of metal filling factor. In the subcritical region with metal filling $p$ lower than the percolation threshold $p_c$, we observe a gap with Lifshitz tails in the spectral density of states (DOS). In the supercritical region $p>p_c$, the DOS demonstrates a crossover between plane-wave two-dimensional plasmons and resonances associated with small clusters." @default.
- W2762955128 created "2017-10-20" @default.
- W2762955128 creator A5011602837 @default.
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- W2762955128 date "2018-05-14" @default.
- W2762955128 modified "2023-09-24" @default.
- W2762955128 title "Two-dimensional plasmons in the random impedance network model of disordered thin film nanocomposites" @default.
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- W2762955128 doi "https://doi.org/10.1103/physrevb.97.184204" @default.
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