As a signature of symmetry-breaking processes, the generation and annihilation of topological defects (domain walls, strings, etc.) are of great interest in condensed matter physics and cosmology. Here we propose a distinctive self-organization process through phase transitions, in which all the generated topological defects are dimensionality reduced and self-annihilated. In crystalline solids, such a unique mechanism allows a perfect single crystal after plastic deformation, which originates from the coupling of different types of broken symmetries.
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Gao, Yipeng; Zhang, Yongfeng; Aagesen, Larry K.; Yu, Jianguo; Long, Min; and Wang, Yunzhi. (2020). "Defect-Free Plastic Deformation Through Dimensionality Reduction and Self-Annihilation of Topological Defects in Crystalline Solids". Physical Review Research, 2(1), 013146-1 - 013146-10. https://dx.doi.org/10.1103/PhysRevResearch.2.013146