[1Ip01-08] Low-dimensional Material/Nanostructure/Nanomaterial (LD/NS/NM)

[1Ip07] STM observation of the surface state of graphene on SiC with deposition of group 14 metals Pb and Sn

*Teppei Imayoshi¹, Syuhei Koyama¹, Akari Takayama¹ (1. School of Advanced Science and Engineering, Waseda University)

Proximity-induced superconductivity in graphene has been recently studied with great interest because the introduction of superconductivity to the Dirac fermions is very attractive. The group 14 elements Pb and Sn is preferred as candidate materials to induce superconductivity. In this study, by using STM, we demonstrate the surface morphology of bilayer graphene/SiC(0001) in samples with different amounts of Sn deposition. We found that crevasse-like groove structures are formed on graphene. Its depth is estimated to be roughly 0.7 nm, which corresponds to an interlayer distance of graphene layers. These results suggest that Sn atoms penetrate the graphene by partially disrupting the graphene. In my presentation, we will present the results of STM experiments measured on samples with different amounts of Sn deposition and discuss the possibility of Proximity-induced superconductivity in bilayer graphene on SiC.