Quantum hydrodynamic model for the nonlinear electron dynamics in thin metal films
نویسندگان
چکیده
P.-A. Hervieux and G. Manfredi∗ Institut de Physique et Chimie des Matériaux de Strasbourg, BP 43, F-67034 Strasbourg, France (Dated: September 8, 2008) Abstract A quantum hydrodynamic (fluid) model, derived from the Wigner-Poisson equations, is used to investigate the ultrafast electron dynamics in thin metal films. The hydrodynamic equations, which include exchange and correlation effects, can be combined into a single nonlinear Schrödinger-type equation. The fluid model is first benchmarked against a density-functional calculation for the ground state, with good agreement between the two approaches. The ultrafast nonlinear electron dynamics is then investigated and compared to recent semiclassical results obtained with a VlasovPoisson approach.
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