▎ 摘　　要

We have observed phenomena in phosphorus-doped graphene films consistent with mixed-state superconductivity at temperatures as high as 260 K. This evidence includes transport, susceptibility and Nernst/Hall measurements as a function of the thermal gradient. This paper presents evidence of vortices and flux flow in the mixed state of phosphorus-doped graphene samples in the form of well-defined Nernst peaks being measurable up to 260 K.