Active dumbbells: Dynamics and morphology in the coexisting region

International audience; With the help of molecular dynamics simulations we study an ensemble ofactive dumbbells in purely repulsive interaction. We derive the phase diagramin the density-activity plane and we characterise the various phases withliquid, hexatic and solid character. The analysis of the structural anddynamical properties, such as enstrophy, mean square displacement,polarisation, and correlation functions, shows the continuous character ofliquid and hexatic phases in the coexisting region when the activity isincreased starting from the passive limit.