Tiras, E.Ardali, S.Firat, H. A.Arslan, E.Özbay, Ekmel2022-02-232022-02-232021-05-191369-8001http://hdl.handle.net/11693/77558The substrate effects on the electronic transport properties of single-layer graphene on TiO2/Si substrate have been studied. The Hall mobility, sheet carrier density, and transport lifetime were obtained from the temperature-dependent Hall measurements, while the in-plane effective mass, quantum lifetime was obtained from the temperature-dependent variation of the Shubnikov de Haas (SdH) oscillations that were made at 1.8 to 45 K temperature range and up to the magnetic field of 11 T. The measurement results showed that in SLG/TiO2/Si sample, there were 2.36 ± 0.12x1016 m-3 amounts of 3D carriers coming from the substrate. In our previous studies, 3D carrier densities were measured as 6.07x1016 m-3 and zero for SLG/SiO2/Si and SLG/SiC sample, respectively. This result shows that the 3D carriers formed in the structure are significantly changed by a substrate. The scattering mechanisms were determined using the ratio. The ratio values obtained as 3.66. This value obtained was compared with the values we found for SLG/SiC (=1.36) sample and SLG/TiO2/Si (=3.08) sample our previous study. The results show that small-angle scattering is dominant in SLG/SiC sample, but large-angle scattering is dominant in SLG/SiO2/Si and SLG/TiO2/Si samples. The charged impurity scattering is the dominant scattering mechanism in SLG/TiO2/Si and SLG/SiO2/Si samples, whereas in SLG/SiC samples, a short-range scattering mechanism such as lattice defects can be said to affect the electronic transport.EnglishGraphene/Ti2O/SiShubnikov de haas oscillationsIn-plane effective massArticle10.1016/j.mssp.2021.1059361873-4081