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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.18138 |
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| _version_ | 1866918130240978944 |
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| author | Han, Meng Dong, Chiheng Yao, Chao Zhang, Zhihao Zhang, Qinghua Gong, Yue Huang, He Gong, Dongliang Wang, Dongliang Zhang, Xianping Liu, Fang Sun, Yuping Zhu, Zengwei Li, Jianqi Luo, Junyi Awaji, Satoshi Wang, Xiaolin Xie, Jianxin Hosono, Hideo Ma, Yanwei |
| author_facet | Han, Meng Dong, Chiheng Yao, Chao Zhang, Zhihao Zhang, Qinghua Gong, Yue Huang, He Gong, Dongliang Wang, Dongliang Zhang, Xianping Liu, Fang Sun, Yuping Zhu, Zengwei Li, Jianqi Luo, Junyi Awaji, Satoshi Wang, Xiaolin Xie, Jianxin Hosono, Hideo Ma, Yanwei |
| contents | Large lossless currents in high-temperature superconductors (HTS) critically rely on dense defects with suitable size and dimensionality to pin vortices, with dislocations being particularly effective due to their one-dimensional geometry to interact extensively with vortex lines. However, in non-metallic compounds such as HTS with rigid lattices, conventional deformation methods typically lead to catastrophic fracture rather than dislocation-mediated plasticity, making it a persistent challenge to introduce dislocations at high density. Here, we propose an asymmetric stress field strategy using extrusion to directly nucleate a high-density of dislocations in HTS by activating shear-driven lattice slip and twisting under superimposed hydrostatic compression. As demonstrated in iron-based superconductors (IBS), atomic displacements of nearly one angstrom trigger the formation of tilted dislocation lines with a density approaching that of metals. With further structural refinement, these dislocations serve as strong pinning centers that lead to a fivefold enhancement in the current-carrying capacity of IBS at 33 T, along with low anisotropy and a large irreversibility field. This work not only establishes a scalable route to engineer pinning landscapes in HTS, but also offers a generalizable framework for manipulating dislocation structures in rigid crystalline systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_18138 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Asymmetric stress engineering of dense dislocations in brittle superconductors for strong vortex pinning Han, Meng Dong, Chiheng Yao, Chao Zhang, Zhihao Zhang, Qinghua Gong, Yue Huang, He Gong, Dongliang Wang, Dongliang Zhang, Xianping Liu, Fang Sun, Yuping Zhu, Zengwei Li, Jianqi Luo, Junyi Awaji, Satoshi Wang, Xiaolin Xie, Jianxin Hosono, Hideo Ma, Yanwei Superconductivity Materials Science Large lossless currents in high-temperature superconductors (HTS) critically rely on dense defects with suitable size and dimensionality to pin vortices, with dislocations being particularly effective due to their one-dimensional geometry to interact extensively with vortex lines. However, in non-metallic compounds such as HTS with rigid lattices, conventional deformation methods typically lead to catastrophic fracture rather than dislocation-mediated plasticity, making it a persistent challenge to introduce dislocations at high density. Here, we propose an asymmetric stress field strategy using extrusion to directly nucleate a high-density of dislocations in HTS by activating shear-driven lattice slip and twisting under superimposed hydrostatic compression. As demonstrated in iron-based superconductors (IBS), atomic displacements of nearly one angstrom trigger the formation of tilted dislocation lines with a density approaching that of metals. With further structural refinement, these dislocations serve as strong pinning centers that lead to a fivefold enhancement in the current-carrying capacity of IBS at 33 T, along with low anisotropy and a large irreversibility field. This work not only establishes a scalable route to engineer pinning landscapes in HTS, but also offers a generalizable framework for manipulating dislocation structures in rigid crystalline systems. |
| title | Asymmetric stress engineering of dense dislocations in brittle superconductors for strong vortex pinning |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2508.18138 |