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Crossover from Nonequilibrium Fractal Growth to Equilibrium Compact Growth

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Solidification controlled by vacancy diffusion is studied by Monte Carlo simulations of a two-dimensional Ising model defined by a Hamiltonian which models a thermally driven fluid-solid phase transition. The nonequilibrium morphology of the growing solid is studied as a function of time as the system relaxes into equilibrium described by a temperature. At low temperatures the model exhibits fractal growth at early times and crossover to compact solidification as equilibrium is approached.

OriginalsprogEngelsk
TidsskriftPhysical Review Letters
Vol/bind61
Udgave nummer24
Sider (fra-til)2770-2773
Antal sider4
ISSN0031-9007
DOI
StatusUdgivet - 1988
Eksternt udgivetJa

ID: 238390450