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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.01100 |
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| _version_ | 1866911352526733312 |
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| author | Yan, Tian Zheng, Ru Sun, Jin-Hua Ma, Fengjie Yan, Xun-Wang Gao, Miao Cui, Tian Lu, Zhong-Yi |
| author_facet | Yan, Tian Zheng, Ru Sun, Jin-Hua Ma, Fengjie Yan, Xun-Wang Gao, Miao Cui, Tian Lu, Zhong-Yi |
| contents | Driving non-superconducting materials into a superconducting state through specific modulation is a key focus in the field of superconductivity. Pressure is a powerful method that can switch a three-dimensional (3D) material between non-superconducting and superconducting states. In the two-dimensional (2D) case, strain engineering plays a similar role to pressure. However, purely strain-induced superconductivity in 2D systems remains exceedingly scarce. Using first-principles calculations, we demonstrate that a superconducting transition can be induced solely by applying biaxial tensile strain in a 2D carbon allotrope, THO-graphene, which is composed of triangles, hexagons, and octagons. Free-standing THO-graphene is non-superconducting. Surprisingly, the electron-phonon coupling in strained THO-graphene is enhanced strong enough to pair electrons and realize superconductivity, with the highest superconducting transition temperature reaching 45 K. This work not only provides a notable example of controlling metal-superconductor transition in 2D system just via strain, but also sets a new record of superconducting transition temperature for 2D elemental superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_01100 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Strain-triggered high-temperature superconducting transition in two-dimensional carbon allotrope Yan, Tian Zheng, Ru Sun, Jin-Hua Ma, Fengjie Yan, Xun-Wang Gao, Miao Cui, Tian Lu, Zhong-Yi Superconductivity Materials Science Computational Physics Driving non-superconducting materials into a superconducting state through specific modulation is a key focus in the field of superconductivity. Pressure is a powerful method that can switch a three-dimensional (3D) material between non-superconducting and superconducting states. In the two-dimensional (2D) case, strain engineering plays a similar role to pressure. However, purely strain-induced superconductivity in 2D systems remains exceedingly scarce. Using first-principles calculations, we demonstrate that a superconducting transition can be induced solely by applying biaxial tensile strain in a 2D carbon allotrope, THO-graphene, which is composed of triangles, hexagons, and octagons. Free-standing THO-graphene is non-superconducting. Surprisingly, the electron-phonon coupling in strained THO-graphene is enhanced strong enough to pair electrons and realize superconductivity, with the highest superconducting transition temperature reaching 45 K. This work not only provides a notable example of controlling metal-superconductor transition in 2D system just via strain, but also sets a new record of superconducting transition temperature for 2D elemental superconductors. |
| title | Strain-triggered high-temperature superconducting transition in two-dimensional carbon allotrope |
| topic | Superconductivity Materials Science Computational Physics |
| url | https://arxiv.org/abs/2601.01100 |