Structural manipulation of the graphene/metal-interface with Ar+ irradiation

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2013
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-5
Series
PHYSICAL REVIEW B, Volume 88, issue 15
Abstract
Controlled defect creation is a prerequisite for the detailed study of disorder effects in materials. Here, we irradiate a graphene/Ir(111) interface with low-energy Ar+ to study the induced structural changes. Combining computer simulations and scanning-probe microscopy, we show that the resulting disorder manifests mainly in the forms of intercalated metal adatoms and vacancy-type defects in graphene. One prominent feature at higher irradiation energies (from 1 keV up) is the formation of linelike depressions, which consist of sequential graphene defects created by the ion channeling within the interface, much like a stone skipping on water. Lower energies result in simpler defects, down to 100 eV, where more than one defect in every three is a graphene single vacancy.
Description
Keywords
81.05.ue, 68.37.Ef, 61.80.-x, 31.15.xv
Other note
Citation
Åhlgren , E H , Hämäläinen , S , Lehtinen , O , Liljeroth , P & Kotakoski , J 2013 , ' Structural manipulation of the graphene/metal-interface with Ar+ irradiation ' , Physical Review B , vol. 88 , no. 15 , 155419 , pp. 1-5 . https://doi.org/10.1103/PhysRevB.88.155419