Spin-Lattice Relaxation in Two-Dimensional Superconducting BKT Transition
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917184252411904 |
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| author | Yang, Wei-Wei Shi, Shao-Hang Zhou, Zongsheng Li, Zi-Xiang Jiang, Kun Hu, Jiangping |
| author_facet | Yang, Wei-Wei Shi, Shao-Hang Zhou, Zongsheng Li, Zi-Xiang Jiang, Kun Hu, Jiangping |
| contents | Two-dimensional superconductors undergo a Berezinskii-Kosterlitz-Thouless transition driven by vortex-antivortex unbinding, yet experimental signatures beyond transport remain limited. Here, we show that the spin-lattice relaxation rate provides a direct probe of this transition. In a 2-dimensional $s$-wave superconductor, $1/T_1T$ develops a Hebel-Slichter-like peak around $T_{\rm{BKT}}$, originating from the emergence of coherence peaks in the density of states, while no peak appears at the pair formation scale $T_{\rm{BCS}}$. We further extend our analysis to the $d$-wave superconductor. Our results highlight spin-lattice relaxation rate as a sensitive tool to detect the superconducting BKT transition and open routes to exploring its manifestation in unconventional pairing states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_13486 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin-Lattice Relaxation in Two-Dimensional Superconducting BKT Transition Yang, Wei-Wei Shi, Shao-Hang Zhou, Zongsheng Li, Zi-Xiang Jiang, Kun Hu, Jiangping Superconductivity 82D55 Two-dimensional superconductors undergo a Berezinskii-Kosterlitz-Thouless transition driven by vortex-antivortex unbinding, yet experimental signatures beyond transport remain limited. Here, we show that the spin-lattice relaxation rate provides a direct probe of this transition. In a 2-dimensional $s$-wave superconductor, $1/T_1T$ develops a Hebel-Slichter-like peak around $T_{\rm{BKT}}$, originating from the emergence of coherence peaks in the density of states, while no peak appears at the pair formation scale $T_{\rm{BCS}}$. We further extend our analysis to the $d$-wave superconductor. Our results highlight spin-lattice relaxation rate as a sensitive tool to detect the superconducting BKT transition and open routes to exploring its manifestation in unconventional pairing states. |
| title | Spin-Lattice Relaxation in Two-Dimensional Superconducting BKT Transition |
| topic | Superconductivity 82D55 |
| url | https://arxiv.org/abs/2511.13486 |