High-field superconductivity from atomic-scale confinement and spin-orbit coupling at (111)$\mathrm{LaAlO_3/KTaO_3}$ interfaces
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910690129739776 |
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| author | Filippozzi, Ulderico Kimbell, Graham Pizzirani, Davide Walker, Siobhan McKeown Cocchi, Chiara Gariglio, Stefano Gabay, Marc Wiedmann, Steffen Caviglia, Andrea D. |
| author_facet | Filippozzi, Ulderico Kimbell, Graham Pizzirani, Davide Walker, Siobhan McKeown Cocchi, Chiara Gariglio, Stefano Gabay, Marc Wiedmann, Steffen Caviglia, Andrea D. |
| contents | We study the superconducting critical fields of two-dimensional electron systems at (111)$\mathrm{LaAlO_3/KTaO_3}$ interfaces as a function of electrostatic back-gating. Our work reveals inplane critical fields of unprecedented magnitudes at oxide interfaces. By comparing the critical fields in-plane and out-of-plane we discover an extremely anisotropic superconductor with an effective thickness below 1 nm and a 12-fold violation of the Chandrasekhar-Clogston paramagnetic limit. The analysis of magneto-transport indicates that the enhancement of the critical fields is due to an exceptionally thin superconducting layer and to a paramagnetic susceptibility suppressed by spin-orbit scattering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_05668 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-field superconductivity from atomic-scale confinement and spin-orbit coupling at (111)$\mathrm{LaAlO_3/KTaO_3}$ interfaces Filippozzi, Ulderico Kimbell, Graham Pizzirani, Davide Walker, Siobhan McKeown Cocchi, Chiara Gariglio, Stefano Gabay, Marc Wiedmann, Steffen Caviglia, Andrea D. Superconductivity Mesoscale and Nanoscale Physics We study the superconducting critical fields of two-dimensional electron systems at (111)$\mathrm{LaAlO_3/KTaO_3}$ interfaces as a function of electrostatic back-gating. Our work reveals inplane critical fields of unprecedented magnitudes at oxide interfaces. By comparing the critical fields in-plane and out-of-plane we discover an extremely anisotropic superconductor with an effective thickness below 1 nm and a 12-fold violation of the Chandrasekhar-Clogston paramagnetic limit. The analysis of magneto-transport indicates that the enhancement of the critical fields is due to an exceptionally thin superconducting layer and to a paramagnetic susceptibility suppressed by spin-orbit scattering. |
| title | High-field superconductivity from atomic-scale confinement and spin-orbit coupling at (111)$\mathrm{LaAlO_3/KTaO_3}$ interfaces |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.05668 |