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

Autor(en)

E. H. Ahlgren, S. K. Hämäläinen, O. Lehtinen, P. Liljeroth, J. Kotakoski

Abstrakt

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.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Aalto University, Universität Ulm, University of Helsinki

Journal

Physical Review B

Band

88

Anzahl der Seiten

5

ISSN

1098-0121

Publikationsdatum

10-2013

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/88455386-b65a-4d6e-bb41-989934f74739