Effect of External Contacts on Edge Magnetic Moments in Graphene Nanoribbons
S. Krompiewski
Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
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The main problem of interest of this study is the influence of external electrodes on the edge magnetic moments in graphene nanoribbons. The studies are carried out within the framework of tight-binding method (for π -state electrons) and the Landauer-Büttiker formalism combined with the Green function technique. It is shown that the edge atom moments get reduced (and eventually disappear) when the graphene nanoribbon/electrode interface becomes more and more transparent for electrons.

DOI: 10.12693/APhysPolA.127.523
PACS numbers: 72.80.Vp, 73.63.Rt, 84.32.Dd