Topological dynamics of vortex-line networks in hexagonal manganites

Fei Xue; Nan Wang; Xueyun Wang; Yanzhou Ji; Sang Wook Cheong; Long Qing Chen

doi:10.1103/PhysRevB.97.020101

Topological dynamics of vortex-line networks in hexagonal manganites

Fei Xue^*, Nan Wang, Xueyun Wang, Yanzhou Ji, Sang Wook Cheong, Long Qing Chen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.

Original language	English
Article number	020101
Journal	Physical Review B
Volume	97
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.97.020101
State	Published - 16 Jan 2018
Externally published	Yes

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title = "Topological dynamics of vortex-line networks in hexagonal manganites",

abstract = "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.",

author = "Fei Xue and Nan Wang and Xueyun Wang and Yanzhou Ji and Cheong, {Sang Wook} and Chen, {Long Qing}",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

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AU - Xue, Fei

AU - Wang, Nan

AU - Wang, Xueyun

AU - Ji, Yanzhou

AU - Cheong, Sang Wook

AU - Chen, Long Qing

PY - 2018/1/16

Y1 - 2018/1/16

N2 - 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.

AB - 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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DO - 10.1103/PhysRevB.97.020101

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SN - 2469-9950

VL - 97

JO - Physical Review B

JF - Physical Review B

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Topological dynamics of vortex-line networks in hexagonal manganites

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