Energy loss of charged particles interacting with simple metal surfaces

Details Energy loss of charged particles interacting with simple metal surfaces Energy loss of charged particles interacting with simple metal surfaces

2001-04-21

arxiv.org/abs/cond-mat/0104405v1

Phys. Rev. B 64, 35423 (2001)

Physics

Condensed Matter

Materials Science

10 pages, 9 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.64.035423

Self-consistent calculations of the energy-loss spectra of charged particles moving near a plane-bounded free electron gas are reported. Energy-loss probabilities are obtained, within linear-response theory, from the knowledge of the density-response function of the inhomogeneous electron system. Self-consistent single-particle wave functions and energies are obtained by solving the Kohn-Sham equation of density-functional theory, and the electronic response is then computed either in the random-phase approximation or with the use of an adiabatic local-density approximation. Special emphasis is placed on the various contributions from collective and electron-hole excitations to the energy loss of charged particles moving parallel with the surface. The effect of the electronic selvage at a metal surface on the energy-loss spectra is also discussed, by comparing our full self-consistent calculations with those obtained for electron densities that drop abruptly to zero at the surface.

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