Active dumbbells: Dynamics and morphology in the coexisting region

Eur Phys J E Soft Matter. 2018 Oct 25;41(10):128. doi: 10.1140/epje/i2018-11739-y.

Abstract

With the help of molecular dynamics simulations we study an ensemble of active dumbbells in purely repulsive interaction. We derive the phase diagram in the density-activity plane and we characterise the various phases with liquid, hexatic and solid character. The analysis of the structural and dynamical properties, such as enstrophy, mean-square displacement, polarisation, and correlation functions, shows the continuous character of liquid and hexatic phases in the coexisting region when the activity is increased starting from the passive limit.

Keywords: Topical issue: Flowing Matter, Problems and Applications.