期刊
PHYSICAL REVIEW B
卷 97, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.020101
关键词
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资金
- Penn State MRSEC, Center for Nanoscale Science [NSF DMR-1420620]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [FG02-07ER46417]
- National Science Foundation [ACI-1053575]
- Gordon and Betty Moore Foundation's EPiQS Initiative [GBMF4413]
- National Natural Science Foundation of China [11604011]
The two-dimensional XY model is the first well-studied system with topological point defects. On the other hand, although topological line defects are common in three-dimensional systems, the evolution mechanism of line defects is not fully understood. The six domains in hexagonal manganites converge to vortex lines in three dimensions. Using phase-field simulations, we predicted that during the domain coarsening process, the vortex-line network undergoes three types of basic topological changes, i.e., vortex-line loop shrinking, coalescence, and splitting. It is shown that the vortex-antivortex annihilation controls the scaling dynamics.
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