Li+ neutralisation in back-scattering from alkali/Al(100) surfaces: comparison between the various alkalis

Goryunov, D.G; Borisov, Andrei G.; Makhmetov, G.E.; Teillet‐Billy, D.; Gauyacq, J.P.

doi:10.1016/s0039-6028(97)01080-7

Cited by 28 publications

(9 citation statements)

References 39 publications

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“…In the low collision energy regime or for systems where the non-adiabatic effects can be expected to be negligible, one can rely on an adiabatic approach and introduce the position and width of the atomic levels into the dynamical treatment of the collision to get the charge transfer probabilities for a given collisional system. This has been done in a parameter free study for the case of Li + neutralization by back-scattering from an alkali covered Al (100) surface [171,180,181]. The theoretical results have been compared with the experimental data of Yarmoff et al [119,182] presented in section 3.…”

Section: Dynamical Studiesmentioning

confidence: 99%

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Gauyacq

Borisov

1998

J. Phys.: Condens. Matter

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A review is presented on the charge transfer process in atom-metal surface collisions, focusing on the modifications of this process induced by the presence of adsorbates on the surface. It concerns primarily the case of low coverages where the adsorbates can be viewed as impurities on a substrate and not the case of very large coverages where the substrate properties disappear. Adsorbed impurities are found to strongly perturb the atom-surface charge transfer process. Two different effects invoked in the interpretation of these perturbations are discussed: the non-local effect due to the change of the surface work-function induced by the adsorbates and the local effect due to the local modifications in the surface electronic structure induced by the adsorbate around itself. Recent experimental and theoretical results on this problem are reviewed, stressing the relative importance of the two effects, i.e. the relative weight of delocalized and localized aspects.

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Section: Dynamical Studiesmentioning

confidence: 99%

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Gauyacq

Borisov

1998

J. Phys.: Condens. Matter

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“…The tunnelling of resonant electrons is crucial to understand and describe charge transfer between ions and various surfaces. An abundance of literature exists exploring these systems, but the mechanisms that control the charge exchange between them are not yet completely understood. − …”

Section: Introductionmentioning

confidence: 99%

Time–Energy Uncertainty and Electronic Correlation in H⁺–Graphite Collisions

et al. 2015

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The formation of negative ions in the scattering of protons by a highly oriented pyrolytic graphite (HOPG) surface is theoretically and experimentally analyzed for a large scattering angle and compared with previous results obtained in the same system but for a forward scattering geometry. These experiments were motivated by the fact that the interaction of a hydrogen atom with a surface is the prototype system for studying the intra-atomic Coulomb repulsion in an s-like valence orbital localized in the atom. We tried to answer the open questions related to the electronic correlation effects and the influence of the detailed surface band structure by using appropriate theoretical models. The comparison with the experiment of theoretical results obtained by using different limit approximations of the electronic repulsion in the atomic state shows the expected validity ranges according to the ion velocity. However, the most remarkable conclusion obtained from this comparison is the nonvalidity of an adiabatic picture of the energy levels shifted by the interactions with the surface atoms, when the energy uncertainty introduced by the ion velocity becomes of the order of the electronic repulsion in the hydrogen ground state.

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“…Most of the experimental work has involved alkali-metal ion neutralization or negative ion formation in ion scattering experiments [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Recently renewed activity has developed in relation with some theoretical work, which points out that [16][17][18][19][20][21][22] energies and widths of atomic states for fixed atom-surface distance are strongly affected by the existence of band gaps and surface states.…”

Section: Introductionmentioning

confidence: 99%

Li+-ion neutralization on metal surfaces and thin films

et al. 2011

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Li + ions with energies ranging from 0.3 to 2 keV are scattered from Au(110) and Pd(100) surfaces and from ultrathin Ag film grown on Au(111) in order to study electron transfer phenomena. We find that neutralization occurs quite efficiently and find an anomalous ion energy dependence of the neutral fraction for Au (110) and Pd(100) surfaces previously noted for Au(111). The dependence of the neutral fraction on the azimuthal angle of the Au(110) and Pd(100) surfaces is reported. In the case of Ag monolayer on Au (111), results are similar to the case of the Ag(111) surface. To understand the anomalous ion energy dependence, we present a theoretical study using density functional theory (DFT) and a linearized rate equation approach, which allows us to follow the Li charge state evolution for the (111) surfaces of Ag, Au, and Cu, and for the Ag-covered Au(111) surface.

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Li+ neutralisation in back-scattering from alkali/Al(100) surfaces: comparison between the various alkalis

Cited by 28 publications

References 39 publications

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Time–Energy Uncertainty and Electronic Correlation in H⁺–Graphite Collisions

Li+-ion neutralization on metal surfaces and thin films

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Li+ neutralisation in back-scattering from alkali/Al(100) surfaces: comparison between the various alkalis

Cited by 28 publications

References 39 publications

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Charge transfer in atom-surface collisions: effect of the presence of adsorbates on the surface

Time–Energy Uncertainty and Electronic Correlation in H+–Graphite Collisions

Li+-ion neutralization on metal surfaces and thin films

Contact Info

Product

Resources

About

Time–Energy Uncertainty and Electronic Correlation in H⁺–Graphite Collisions