Nuclear spin coherence in superconducting Nb$_3$Sn
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909652146454528 |
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| author | Zhai, Gan Halperin, William P. Reyes, Arneil P. Posen, Sam Tarantini, Chiara Mandal, Manish Larbalestier, David C. |
| author_facet | Zhai, Gan Halperin, William P. Reyes, Arneil P. Posen, Sam Tarantini, Chiara Mandal, Manish Larbalestier, David C. |
| contents | We have investigated the normal and superconducting states of the technologically important compound Nb$_3$Sn using $^{93}$Nb nuclear magnetic resonance. From spin-lattice relaxation we find strong suppression of the zero-temperature superconducting order parameter by magnetic field. Additionally we have identified an anomalously large electron-nuclear exchange interaction from spin-spin relaxation measurements, an order of magnitude beyond that of the nuclear dipolar coupling. This RKKY interaction evolves from normal to superconducting states, becoming essentially Lorentzian in the low temperature limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00566 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nuclear spin coherence in superconducting Nb$_3$Sn Zhai, Gan Halperin, William P. Reyes, Arneil P. Posen, Sam Tarantini, Chiara Mandal, Manish Larbalestier, David C. Superconductivity We have investigated the normal and superconducting states of the technologically important compound Nb$_3$Sn using $^{93}$Nb nuclear magnetic resonance. From spin-lattice relaxation we find strong suppression of the zero-temperature superconducting order parameter by magnetic field. Additionally we have identified an anomalously large electron-nuclear exchange interaction from spin-spin relaxation measurements, an order of magnitude beyond that of the nuclear dipolar coupling. This RKKY interaction evolves from normal to superconducting states, becoming essentially Lorentzian in the low temperature limit. |
| title | Nuclear spin coherence in superconducting Nb$_3$Sn |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2502.00566 |