Computer simulation of vortex formation during domain growth
Research output: Contribution to journal › Journal article › peer-review
We have studied the finite-temperature domain-growth kinetics in two-dimensional models with high ground-state degeneracy and non-conserved order parameter by means of Monte Carlo temperature-quenching techniques. The models are Q-state Potts models with anisotropic pair potential which at low temperatures are found to develop vortex structures during the non-equilibrium domain-growth process. The vortex formation is an entropy-driven effect in this model. We have identified vortex-antivortex pairs as a significant structural element of the temporal domain-boundary morphology and shown that the vortices and anti-vortices annihilate during the growth process without pinning the ordering process. The resulting growth law as derived from the excess domain-wall energy and the vortex density is found to be the Lifshitz-Allen-Cahn law with the classical exponent value, n = ½, independent of the ordering degeneracy Q.
Original language | English |
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Journal | Physica Scripta |
Volume | T33 |
Pages (from-to) | 180-184 |
Number of pages | 5 |
ISSN | 0031-8949 |
DOIs | |
Publication status | Published - 1990 |
ID: 236893854