State diagram of polydisperse elastic-disk systems

Relying on molecular dynamics simulations, we investigate the state diagram of elastic disks in two dimensions in the microcanonical ensemble under the new aspect of different bidispersities and polydispersities, i.e., different particle radii distributions. We find an Adler transition heralded by a plateau in the pressure-density diagram. In terms of dispersity, we see a universal liquid branch. The solid branch and the coexisting region change. The latter vanishes above a critical polydispersity independent of the radius distribution.