Uniaxial spin texture in a superconducting electron gas revealed by exchange interactions
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
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| _version_ | 1866910259101040640 |
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| author | Yang, Junyi Liu, Changjiang Zhou, Xianjing Hou, Hanyu Yin, Kaijun Wen, Jianguo Pearson, John Suslov, Alexey Jin, Dafei Jiang, Jidong S. Welp, Ulrich Zuo, Jian-Min Norman, Michael R. Bhattacharya, Anand |
| author_facet | Yang, Junyi Liu, Changjiang Zhou, Xianjing Hou, Hanyu Yin, Kaijun Wen, Jianguo Pearson, John Suslov, Alexey Jin, Dafei Jiang, Jidong S. Welp, Ulrich Zuo, Jian-Min Norman, Michael R. Bhattacharya, Anand |
| contents | Two-dimensional superconductors with spin-textured Fermi surfaces can be a platform for realizing unconventional pairing states and are of substantial interest in the context of quantum information science, and superconducting spintronics/orbitronics. We observed an unusual in-plane uniaxial anisotropy in the superconducting 2D electron gas (2DEG) formed at EuOx/KTaO3 (110) interfaces, where the EuOx is magnetic. This anisotropy is not evident in AlOx/KTaO3 (110) where the overlayer is non-magnetic. Our results are consistent with a highly anisotropic 'half-Rashba' spin-textured Fermi surface in 2DEGs formed at the KTaO3 (110) interface that is hidden from external magnetic fields due to a near cancellation between orbital and spin moments but revealed by exchange interactions of the electrons in the 2DEG with Eu moments near the EuOx/KTaO3 (110) interface. The interactions between the uniaxial spin texture and the magnetic overlayer offer new ways to explore the interplay between magnetism and 2D superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_19599 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Uniaxial spin texture in a superconducting electron gas revealed by exchange interactions Yang, Junyi Liu, Changjiang Zhou, Xianjing Hou, Hanyu Yin, Kaijun Wen, Jianguo Pearson, John Suslov, Alexey Jin, Dafei Jiang, Jidong S. Welp, Ulrich Zuo, Jian-Min Norman, Michael R. Bhattacharya, Anand Superconductivity Mesoscale and Nanoscale Physics Materials Science Two-dimensional superconductors with spin-textured Fermi surfaces can be a platform for realizing unconventional pairing states and are of substantial interest in the context of quantum information science, and superconducting spintronics/orbitronics. We observed an unusual in-plane uniaxial anisotropy in the superconducting 2D electron gas (2DEG) formed at EuOx/KTaO3 (110) interfaces, where the EuOx is magnetic. This anisotropy is not evident in AlOx/KTaO3 (110) where the overlayer is non-magnetic. Our results are consistent with a highly anisotropic 'half-Rashba' spin-textured Fermi surface in 2DEGs formed at the KTaO3 (110) interface that is hidden from external magnetic fields due to a near cancellation between orbital and spin moments but revealed by exchange interactions of the electrons in the 2DEG with Eu moments near the EuOx/KTaO3 (110) interface. The interactions between the uniaxial spin texture and the magnetic overlayer offer new ways to explore the interplay between magnetism and 2D superconductivity. |
| title | Uniaxial spin texture in a superconducting electron gas revealed by exchange interactions |
| topic | Superconductivity Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2502.19599 |