Identifying anomalous diffusion and melting in dusty plasmas
- Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242 (United States)
Anomalous diffusion in liquids and the solid-liquid phase transition (melting) are studied in two-dimensional Yukawa systems. The self-intermediate scattering function (self-ISF), calculated from simulation data, exhibits a temporal decay, or relaxation, with a characteristic relaxation time. This decay is found to be useful for distinguishing normal and anomalous diffusion in a liquid, and for identifying the solid-liquid phase transition. For liquids, a scaling of the relaxation time with length scale is found. For the solid-liquid phase transition, the shape of the self-ISF curve is found to be a sensitive indicator of phase. Friction has a significant effect on the timing of relaxation, but not the melting point.
- OSTI ID:
- 21464501
- Journal Information:
- Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevE.82.036403; (c) 2010 The American Physical Society; ISSN 1539-3755
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microscopic Theory of the Long-Time Diffusivity and Intermediate-Time Anomalous Transport of a Nanoparticle in Polymer Melts
Microscopic Theory of Long-Time Center-of-Mass Self-Diffusion and Anomalous Transport in Ring Polymer Liquids
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
DIFFUSION
DUSTS
FRICTION
LIQUIDS
MELTING
MELTING POINTS
PLASMA
RELAXATION
RELAXATION TIME
SOLIDS
TWO-DIMENSIONAL CALCULATIONS
FLUIDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SIMULATION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE