Geometric Control of Pairing: Universal Scaling of Superconductivity at KTaO3 Interfaces
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912757509521408 |
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| author | Cao, Xueshan Zhang, Meng Wang, Yishuai Qin, Ming Zhou, Yi Xie, Yanwu |
| author_facet | Cao, Xueshan Zhang, Meng Wang, Yishuai Qin, Ming Zhou, Yi Xie, Yanwu |
| contents | The superconducting transition temperature Tc at KTaO3-based oxide interfaces exhibits a dramatic dependence on crystallographic orientation, yet a unifying principle has remained elusive. Here, we discover a universal linear scaling between Tc and a single geometric parameter - the angle θ between the (hkl) plane and the (100) plane - across ten different orientations of LaAlO3/KTaO3 interfaces. With the exception of (100), all orientations exhibit two dimensional superconductivity, with transition temperatures Tc ranging from ~ 0.12 K to 1.9 K. This linear θ-Tc scaling is robust against variations in growth temperature, device geometry, and transport configuration. By establishing geometric orientation as a direct control knob for pairing strength, our results impose a critical benchmark for microscopic theories of superconductivity in KTaO3-based systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_10301 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Geometric Control of Pairing: Universal Scaling of Superconductivity at KTaO3 Interfaces Cao, Xueshan Zhang, Meng Wang, Yishuai Qin, Ming Zhou, Yi Xie, Yanwu Superconductivity The superconducting transition temperature Tc at KTaO3-based oxide interfaces exhibits a dramatic dependence on crystallographic orientation, yet a unifying principle has remained elusive. Here, we discover a universal linear scaling between Tc and a single geometric parameter - the angle θ between the (hkl) plane and the (100) plane - across ten different orientations of LaAlO3/KTaO3 interfaces. With the exception of (100), all orientations exhibit two dimensional superconductivity, with transition temperatures Tc ranging from ~ 0.12 K to 1.9 K. This linear θ-Tc scaling is robust against variations in growth temperature, device geometry, and transport configuration. By establishing geometric orientation as a direct control knob for pairing strength, our results impose a critical benchmark for microscopic theories of superconductivity in KTaO3-based systems. |
| title | Geometric Control of Pairing: Universal Scaling of Superconductivity at KTaO3 Interfaces |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2512.10301 |