Lifshitz-Slyozov kinetics of a nonconserved system that separates into phases of different density
Research output: Contribution to journal › Journal article › Research › peer-review
Computer-simulation techniques are applied to analyze the late-stage ordering kinetics of a two-dimensional annealed dilute Ising model quenched into regions of its phase diagram that involve phase separation of phases with different densities. The order parameter of the model is a nonconserved quantity, whereas the global density is conserved. The ordered phases of the model are fourfold degenerate (2×1) and (2×2) superstructures on a square lattice. The equilibrium phase diagram involves a region of coexisting (2×1) and (2×2) phases and a region where the (2×2) phase coexists together with a gas phase. The results of the study show that the phase-separation kinetics in all cases are consistent with the Lifshitz-Slyozov growth law, R»(t)t1/3, where R»(t) is the characteristic linear domain size. These results are in agreement with recent low-energy electron-diffraction studies of the phase-separation kinetics in O/W(110) systems at high coverage.
Original language | English |
---|---|
Journal | Physical Review B (Condensed Matter and Materials Physics) |
Volume | 42 |
Issue number | 7 |
Pages (from-to) | 4506-4513 |
Number of pages | 8 |
ISSN | 2469-9950 |
DOIs | |
Publication status | Published - 1990 |
Externally published | Yes |
ID: 238387147