Nonadiabatic effects in atom-surface charge transfer

Canário, A.R.; Borisov, Andrei G.; Gauyacq, J.P.; Esaulov, Vladimir A.

doi:10.1103/physrevb.71.121401

Cited by 62 publications

(33 citation statements)

References 22 publications

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“…In a very recent calculation, this seems to be related to a much larger Li (2 s) level width [28] than predicted by earlier DFT calculations [19,20,23]. Another possible problem may be that a rate equation approach for determining the level populations, used in such descriptions, may not be suitable for a situation where the atomic level stays close to the Fermi level for large atom-surface distances.…”

Section: Resultsmentioning

confidence: 90%

“…The results of this study need to be put into the perspective of a complex problem related in general to alkali ion neutralization on metal surfaces. While alkali neutralization on bulk metal surfaces seemed well understood [18][19][20], recent experiments [21][22][23][24] revealed very wide discrepancies with predictions of these "standard" jellium-like models of metals using a rate equation approach to describe neutralization. It was indeed found, as may also be seen in the Au thin film limit of Fig.…”

Section: Resultsmentioning

confidence: 99%

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Electron transfer processes on Au nanoclusters supported on graphite

et al. 2013

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Electron transfer processes play an important role in surface chemistry. This paper presents results of a study of changes in resonant electron transfer processes, as a function of gold cluster sizes, on the example of electron transfer between Li + ions scattered on Au clusters on highly oriented pyrolytic graphite (HOPG). The gold nanoclusters were grown on lightly sputtered HOPG surface in order to obtain a wide coverage distribution of clusters. The growth of clusters was monitored by scanning tunneling microscopy. We found that electron transfer is much more probable on small clusters, whose lateral size is of the order of 2 to 3 nm and height in the 1-nm range, than on bulk Au or thin Au films. A comparison with Au clusters grown on the semiconducting titania did not reveal significant differences with HOPG.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Electron transfer processes on Au nanoclusters supported on graphite

et al. 2013

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“…As a result, charge transfer rates should vary depending on the energetic positions of the projectile ionization or affinity levels and indeed such effects have been found using the CHC method outlined above [14]. Theory [17,18] and experiment [18] show that the signature of the band structure in the charge transfer rates vanishes for increasing particle energies, corresponding to decreasing interaction times. We will see that this aspect is also of fundamental importance for experiments with attosecond light pulses and their interpretation.…”

Section: Scattering Experiments and Band Structure Buildupmentioning

confidence: 99%

Attosecond Time‐Resolved Spectroscopy at Surfaces

Cavalieri

Krausz

Ernstorfer

et al. 2010

Dynamics at Solid State Surfaces and Interfaces

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An area of physics exhibiting rapid progress and strongly focused interest is that of extremely fast phenomena; both the development of suitable methods and the understanding of such processes are at issue. While the term ultrafast was originally used for processes occurring in the (first upper, then lower) femtosecond range, today timescales of 1 fs or fractions thereof are accessible. This does not represent a marginal improvement, but encompasses a qualitative change: from the range where in principle the Born-Oppenheimer approximation, albeit with diabatic extensions, can be applied, to that of true nonadiabatic response, where the motion of individual electrons becomes the focus of attention. Therefore, the opportunity now exists to investigate the motions of electrons within many-electron systems, including the development of coupled many-body responses like the formation of band structure and the buildup of screening responses. First attempts to push into this range by looking at, for example, the ultrafast charge transfer at surfaces have been made successfully in the last 15 years with the core hole clock method. However, the latest developments utilizing attosecond laser pulses promise to provide a general tool to investigate in detail, and with few restrictions, this realm of electronic motions. While significant methodological development remains necessary for complete utilization and interpretation of measurements made on the attosecond timescale, the results obtained so far are extremely promising. It is timely, therefore, to give an overview of some past approaches, the most recent developments, and to identify the types of problems that should be attacked in the future using this exciting new tool. We will focus in particular on processes occurring at surfaces, because they contain in nuce the ingredients operative in atoms and molecules together with the important effects of solids.

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“…at higher collision velocity perpendicular to the surface revealed that the situation is more complex and that the effect of the target electronic structure is not always as obvious as in the above-mentioned systems [15,16]. [16]) Figure 3 presents the neutralization probability of Li + ions colliding on a Ag(100) surface as a function of the projectile energy in the few hundreds eV range [16].…”

Section: Collisional Charge Transfermentioning

confidence: 99%

Theoretical study of excited electronic states at surfaces, link with photo-emission and photo-desorption experiments

Gauyacq

Borisov

Kazansky

2008

J. Phys.: Conf. Ser.

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Abstract. Excited electronic states at surfaces play a very important role in a variety of surface processes. These excited states have a finite lifetime due to electron-transfer processes and their efficiency as reaction intermediates depends crucially on their lifetime. A review of several physical situations, where an excited electronic state localized on an atom interacting with a metal surface intervenes in a surface process, is presented with an emphasis on the way the metal electronic structure influences the excited state dynamics. Examples are chosen among the alkali/metal systems, stressing how the same transient electronic state can influence different dynamical processes.

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Nonadiabatic effects in atom-surface charge transfer

Cited by 62 publications

References 22 publications

Electron transfer processes on Au nanoclusters supported on graphite

Electron transfer processes on Au nanoclusters supported on graphite

Attosecond Time‐Resolved Spectroscopy at Surfaces

Theoretical study of excited electronic states at surfaces, link with photo-emission and photo-desorption experiments

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