2014/10/31 by I. Shlimak, A. Haran, Avner Haran +13 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Condensed matter physics #Electrical resistivity and conductivity #Graphene #Graphene research and applications #Ion-surface interactions and analysis #Materials science #Monolayer #Nanotechnology #Optics #Physics #Raman scattering #Raman spectroscopy #Scattering #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.91.045414
published as Phys. Rev. B 91, 045414 (2015) · 5 pages, 5 eps figures. As accepted for publication in PRB
arxiv created 2015/01/02 · openalex publication_date 2015/01/12 · arxiv updated 2015/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Raman scattering (RS) spectra and current-voltage characteristics at room temperature were measured in six series of small samples fabricated by means of electron-beam lithography on the surface of a large size (5\ifmmode×\else\texttimes\fi5\phantom\rule4.pt0exmm) industrial monolayer graphene film. Samples were irradiated by different doses of C+ ion beam up to 1015 cm^\ensuremath-2. It was observed that at the utmost degree of disorder, the Raman spectra lines disappear which is accompanied by the exponential increase of resistance and change in the current-voltage characteristics. These effects are explained by suggestion that highly disordered graphene film ceases to be continuous and splits into separate fragments. The relationship between structure (intensity of RS lines) and sample resistance is defined. It is shown that the maximal resistance of the continuous film is of the order of reciprocal value of the minimal graphene conductivity \ensuremathπh/4e2\ensuremath≈20 kOhm.