Trails of kilovolt ions created by subsurface channeling

Using scanning tunneling microscopy, we observe the damage trails produced by keV noble-gas ions incident at glancing angles onto Pt(111). Surface vacancies and adatoms aligned along the ion trajectory constitute the ion trails. Atomistic simulations reveal that these straight trails are produced by...

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Bibliographic Details
Published in:Physical review letters 2010-02, Vol.104 (7), p.075501-075501, Article 075501
Main Authors: Redinger, Alex, Standop, Sebastian, Michely, Thomas, Rosandi, Yudi, Urbassek, Herbert M
Format: Article
Language:English
Subjects:
ACCURACY
ASYMMETRY
ATOMS
CHANNELING
CHARGED PARTICLES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
INCIDENCE ANGLE
IONS
KEV RANGE
MATERIALS SCIENCE
METALS
MICROSCOPY
NONMETALS
PLATINUM
PLATINUM METALS
POINT DEFECTS
RARE GASES
SCANNING TUNNELING MICROSCOPY
SURFACES
TRAJECTORIES
TRANSITION ELEMENTS
VACANCIES
XENON IONS
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Summary:Using scanning tunneling microscopy, we observe the damage trails produced by keV noble-gas ions incident at glancing angles onto Pt(111). Surface vacancies and adatoms aligned along the ion trajectory constitute the ion trails. Atomistic simulations reveal that these straight trails are produced by nuclear (elastic) collisions with surface layer atoms during subsurface channeling of the projectiles. In a small energy window around 5 keV, Xe+ ions create vacancy grooves that mark the ion trajectory with atomic precision. The asymmetry of the adatom production on the two sides of the projectile path is traced back to the asymmetry of the ion's subsurface channel.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.104.075501