Rosandi, Yudi ORCID: 0000-0003-2387-1338, Redinger, Alex
ORCID: 0000-0002-2958-3102, Michely, Thomas and Urbassek, Herbert M.
(2010).
Sputtering at grazing ion incidence: Influence of adatom islands.
Phys. Rev. B, 82 (12).
COLLEGE PK:
AMER PHYSICAL SOC.
ISSN 2469-9969
Abstract
When energetic ions impinge at grazing incidence onto an atomically flat terrace, they will not sputter. However, when adatom islands (containing N atoms) are deposited on the surface, they induce sputtering. We investigate this effect for the specific case of 83 degrees-incident 5 keV Ar ions on a Pt (111) surface by means of molecular-dynamics simulation and experiment. We find that-for constant coverage Theta-the sputter yield has a maximum at island sizes of N congruent to 10-20. A detailed picture explaining the decline of the sputter yield toward larger and smaller island sizes is worked out. Our simulation results are compared with dedicated sputtering experiments, in which a coverage of Theta = 0.09 of Pt adatoms are deposited onto the Pt (111) surface and form islands with a broad distribution around a most probable size of N congruent to 20.
Item Type: | Journal Article | ||||||||||||||||||||
Creators: |
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URN: | urn:nbn:de:hbz:38-496457 | ||||||||||||||||||||
DOI: | 10.1103/PhysRevB.82.125440 | ||||||||||||||||||||
Journal or Publication Title: | Phys. Rev. B | ||||||||||||||||||||
Volume: | 82 | ||||||||||||||||||||
Number: | 12 | ||||||||||||||||||||
Date: | 2010 | ||||||||||||||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||||||||||||||
Place of Publication: | COLLEGE PK | ||||||||||||||||||||
ISSN: | 2469-9969 | ||||||||||||||||||||
Language: | English | ||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||
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URI: | http://kups.ub.uni-koeln.de/id/eprint/49645 |
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