Azimuthal dependence of charge exchange in grazing scattering of 4 keV ions on a NaCl(100) surface: Role of the trajectory

Ion channeling is used to investigate the electronic density corrugation at surfaces by analysing the electronic stopping behaviour of ions scattering grazingly off a clean single crystalline Pt(110).1 × 2/ surface. We use the fact that under these conditions the elastic contribution can be separated from the inelastic energy-loss processes, which are closely related to the electronic density sampled along the projectiles trajectories. Therefore, we have a direct probe of the surface electronic density structure. Here, experiments and their theoretical interpretation for N + ions at primary ion energies of 1-10 keV are presented. Multi-peak features of the energy spectra, depending on the azimuthal surface orientation, are attributed to different particle trajectories. A detailed analysis of trajectory calculations affords an unambiguous assignment of the observed peak structures to three trajectory classes, each sampling specific energy losses. The comparison of the experimental energy-loss values with results obtained from a surfaceadapted energy-loss model for ion scattering that includes the electron density allows us to investigate the electronic surface of the sample. The results are compared with calculated surface electron density contours. Reasonable agreement is obtained, showing that the presented method is suitable to characterize the electronic density structure at crystalline surfaces.

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Electronic stopping of keV nitrogen ions interacting with a Pt(110)(1 × 2) surface—a tool to characterize electronic surfaces

Robin

Postnikov

Heiland

2005

Surface & Interface Analysis

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Simulations of the azimuthal distribution of low-energy H atoms scattered off Ag() at grazing incidence: DFT many-body versus model pair potentials

Cafarelli

Richard‐Viard

Benazeth

et al. 2003

Nuclear Instruments and Methods in Physics Research Section B:

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Trajectory straggling and nonlinear effects in the energy loss of surface-channeled ions

Robin

Reiniger

Närmann³

et al. 2003

Phys. Rev. B

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Azimuthal dependence of charge exchange in grazing scattering of 4 keV ions on a NaCl(100) surface: Role of the trajectory

Cited by 4 publications

References 19 publications

Electronic stopping of keV nitrogen ions interacting with a Pt(110)(1 × 2) surface—a tool to characterize electronic surfaces

Electronic stopping of keV nitrogen ions interacting with a Pt(110)(1 × 2) surface—a tool to characterize electronic surfaces

Simulations of the azimuthal distribution of low-energy H atoms scattered off Ag() at grazing incidence: DFT many-body versus model pair potentials

Trajectory straggling and nonlinear effects in the energy loss of surface-channeled ions

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