Effective mass in bilayer graphene with hydrogen intercalated atoms at low carrier densities

We report an experimental investigation of Shubnikov-de-Haas oscillation damping in hydrogenated bilayer graphene on SiC. The damping behavior of the oscillations was analyzed to determine the charge-carrier temperature, which was found to be 1.68-2.5 K. The corresponding oscillation frequencies were observed to be between ( . This analysis allowed the effective mass of electrons to be estimated, which was found to be 1.4 times that of bilayer graphene without hydrogenation. The implications of the increased effective mass are reflected in mobility and the scattering time with phonons, both of which are crucial in the efficiency of electronic devices. We attribute this difference in the electronic band structure change due to hydrogen intercalation, which is inherently connected to modifications in the bonding of carbon orbitals.