Phase diagram and dynamics of Yukawa systems

摘要: The phase diagram and dynamical properties of systems particles interacting through a repulsive screened Coulomb (Yukawa) potential have been calculated using molecular lattice dynamics techniques. contains both melting transition from fcc to bcc crystalline phases. These transitions studied as function shape (screening length) compared phenomenological criteria for temperatures such those Lindemann Hansen Verlet. with increasing temperature is shown result higher entropy in the because its softer shear modes. Even when stable solid below fcc, bcc‐like local order found liquid phase. This may substantially slow crystallization. modulus are good agreement experiments on colloidal suspensions polystyrene spheres. single particle Yukawa show several unusual features. There pronounced subdiffusive regime liquids near temperature. reflects existence two time scales: typical phonon period, feel new environment. second scale becomes longer lowered or range interaction increases.