▎ 摘　　要

The intrinsic peaks due to the topological transition of the Fermi surface shape, which appear in the resistivity as a function of carrier density and perpendicular electric field, were studied in AB-stacked six-layer graphene as a system with three bilayerlike bands. By the Landau level structure measured in low-temperature magnetotransport experiments, and by band structure calculations, it is shown that the ridge structures correspond one to one with the characteristic positions in the dispersion relations. Some ridges originated from electronic states near the bottoms of the bilayerlike bands that appear at the carrier density of the zero-mode Landau levels. Some ridges originated from the mini-Dirac cones formed in the perpendicular electric field because of hybridization of bilayerlike bands.