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- W2033904024 abstract "The results of a theoretical investigation on the stopping power of ions moving in a two-dimensional degenerate electron gas are presented. The stopping power for an ion is calculated employing linear-response theory using the dielectric function approach. The collisions, which lead to a damping of plasmons and quasiparticles in the electron gas, is taken into account through a relaxation-time approximation in the linear-response function. The stopping power for an ion is calculated in both the low- and high-velocity limits. In order to highlight the effects of damping, we present a comparison of our analytical and numerical results, in the case of pointlike ions, obtained for a nonzero damping with those for a vanishing damping. It is shown that the equipartition sum rule first formulated by Lindhard and Winther for three-dimensional degenerate electron gas does not necessarily hold in two dimensions. We have generalized this rule introducing an effective dielectric function. In addition, some results for two-dimensional interacting electron gas have been obtained. In this case, the exchange-correlation interactions of electrons are considered via local-field corrected dielectric function." @default.
- W2033904024 created "2016-06-24" @default.
- W2033904024 creator A5017159893 @default.
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- W2033904024 date "2009-07-10" @default.
- W2033904024 modified "2023-10-18" @default.
- W2033904024 title "Interaction of fast charged projectiles with two-dimensional electron gas: Interaction and collisional-damping effects" @default.
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- W2033904024 doi "https://doi.org/10.1103/physreve.80.016402" @default.
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