A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface
Spin–orbit interaction is essential to enhance the in-plane upper critical field of two-dimensional superconductors. Here, we report the LaAlO _3 /KTaO _3 (111) superconducting interface ( T _c,0 ≈ 0.475 K) with a high in-plane upper critical field (∼1.6 T), which is approximately 1.8 times the Paul...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/acbae4 |
| _version_ | 1827871386499022848 |
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| author | Zitao Zhang Weimin Jiang Tingna Shao Yujie Qiao Xingyu Chen Qiang Zhao Meihui Chen Ruifen Dou Changmin Xiong Jiacai Nie |
| author_facet | Zitao Zhang Weimin Jiang Tingna Shao Yujie Qiao Xingyu Chen Qiang Zhao Meihui Chen Ruifen Dou Changmin Xiong Jiacai Nie |
| author_sort | Zitao Zhang |
| collection | DOAJ |
| description | Spin–orbit interaction is essential to enhance the in-plane upper critical field of two-dimensional superconductors. Here, we report the LaAlO _3 /KTaO _3 (111) superconducting interface ( T _c,0 ≈ 0.475 K) with a high in-plane upper critical field (∼1.6 T), which is approximately 1.8 times the Pauli paramagnetic limit. The H $ - $ T superconducting phase diagram is well-fitted by the Klemm–Luther–Beasley (KLB) theory, and the relevant spin–orbit scattering (SOS) length is approximately 32 nm. Furthermore, normal-state magnetotransport measurements show signatures of weak antilocalization caused by strong spin–orbit coupling in LaAlO _3 /KTaO _3 (111). The spin diffusion length derived from magnetotransport measurements was 40 nm at 2 K, which is comparable with the SOS length. The conformity of the phase diagram with the KLB theory and the consistency of normal state spin diffusion length and superconducting SOS length indicate that the high in-plane upper critical field at the LaAlO _3 /KTaO _3 (111) superconducting interface is enhanced by SOS. |
| first_indexed | 2024-03-12T16:08:44Z |
| format | Article |
| id | doaj.art-a5a2ebd290ce484c810179d8d96c7417 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:08:44Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a5a2ebd290ce484c810179d8d96c74172023-08-09T14:13:19ZengIOP PublishingNew Journal of Physics1367-26302023-01-0125202302310.1088/1367-2630/acbae4A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interfaceZitao Zhang0https://orcid.org/0000-0002-3878-3296Weimin Jiang1https://orcid.org/0000-0002-3979-6507Tingna Shao2Yujie Qiao3Xingyu Chen4Qiang Zhao5Meihui Chen6Ruifen Dou7https://orcid.org/0000-0003-2831-045XChangmin Xiong8Jiacai Nie9Department of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaSpin–orbit interaction is essential to enhance the in-plane upper critical field of two-dimensional superconductors. Here, we report the LaAlO _3 /KTaO _3 (111) superconducting interface ( T _c,0 ≈ 0.475 K) with a high in-plane upper critical field (∼1.6 T), which is approximately 1.8 times the Pauli paramagnetic limit. The H $ - $ T superconducting phase diagram is well-fitted by the Klemm–Luther–Beasley (KLB) theory, and the relevant spin–orbit scattering (SOS) length is approximately 32 nm. Furthermore, normal-state magnetotransport measurements show signatures of weak antilocalization caused by strong spin–orbit coupling in LaAlO _3 /KTaO _3 (111). The spin diffusion length derived from magnetotransport measurements was 40 nm at 2 K, which is comparable with the SOS length. The conformity of the phase diagram with the KLB theory and the consistency of normal state spin diffusion length and superconducting SOS length indicate that the high in-plane upper critical field at the LaAlO _3 /KTaO _3 (111) superconducting interface is enhanced by SOS.https://doi.org/10.1088/1367-2630/acbae4superconductorsLaAlO3/KTaO3 (111)spin-orbit scatteringPauli paramagnetic limit |
| spellingShingle | Zitao Zhang Weimin Jiang Tingna Shao Yujie Qiao Xingyu Chen Qiang Zhao Meihui Chen Ruifen Dou Changmin Xiong Jiacai Nie A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface New Journal of Physics superconductors LaAlO3/KTaO3 (111) spin-orbit scattering Pauli paramagnetic limit |
| title | A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface |
| title_full | A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface |
| title_fullStr | A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface |
| title_full_unstemmed | A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface |
| title_short | A spin–orbit scattering–enhanced high upper critical field at the LaAlO3/KTaO3(111) superconducting interface |
| title_sort | spin orbit scattering enhanced high upper critical field at the laalo3 ktao3 111 superconducting interface |
| topic | superconductors LaAlO3/KTaO3 (111) spin-orbit scattering Pauli paramagnetic limit |
| url | https://doi.org/10.1088/1367-2630/acbae4 |
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