Correlation between unconventional superconductivity and strange metallicity revealed by operando superfluid density measurements
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914296655511552 |
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| author | Zhang, Ruozhou Qin, Mingyang Li, Chenyuan Zhao, Zhanyi Wei, Zhongxu Xu, Juan Jiang, Xingyu Cheng, Wenxin Shi, Qiuyan Wang, Xuewei Yuan, Jie Li, Yangmu Chen, Qihong Xiang, Tao Sachdev, Subir Li, Zi-Xiang Jin, Kui Zhao, Zhongxian |
| author_facet | Zhang, Ruozhou Qin, Mingyang Li, Chenyuan Zhao, Zhanyi Wei, Zhongxu Xu, Juan Jiang, Xingyu Cheng, Wenxin Shi, Qiuyan Wang, Xuewei Yuan, Jie Li, Yangmu Chen, Qihong Xiang, Tao Sachdev, Subir Li, Zi-Xiang Jin, Kui Zhao, Zhongxian |
| contents | Strange-metal behavior has been observed in superconductors ranging from cuprates to pressurized nickelates, but its relationship to unconventional superconductivity remains elusive. Here, we perform operando superfluid density measurements on ion-gated FeSe films. We observe for the first time a synchronized evolution of superconducting condensate and the strange-metal phase with electron doping. A linear scaling between zero-temperature superfluid density and the strange-metal resistivity coefficient is further established, which nails down a direct link between the formation of superfluid in the superconducting state and the scattering of carriers in the strange-metal normal state. Remarkably, the scaling also applies for different iron-based and cuprate superconductors despite their distinct electronic structures and pairing symmetries. Such a correlation can be reproduced in a theoretical calculation on the two-dimensional Yukawa-Sachdev-Ye-Kitaev model by considering a cooperative effect of quantum critical fluctuation and disorder. These findings indicate a fundamental principle governing superconducting condensation and strange-metal scattering in unconventional superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_18515 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Correlation between unconventional superconductivity and strange metallicity revealed by operando superfluid density measurements Zhang, Ruozhou Qin, Mingyang Li, Chenyuan Zhao, Zhanyi Wei, Zhongxu Xu, Juan Jiang, Xingyu Cheng, Wenxin Shi, Qiuyan Wang, Xuewei Yuan, Jie Li, Yangmu Chen, Qihong Xiang, Tao Sachdev, Subir Li, Zi-Xiang Jin, Kui Zhao, Zhongxian Superconductivity Strongly Correlated Electrons Strange-metal behavior has been observed in superconductors ranging from cuprates to pressurized nickelates, but its relationship to unconventional superconductivity remains elusive. Here, we perform operando superfluid density measurements on ion-gated FeSe films. We observe for the first time a synchronized evolution of superconducting condensate and the strange-metal phase with electron doping. A linear scaling between zero-temperature superfluid density and the strange-metal resistivity coefficient is further established, which nails down a direct link between the formation of superfluid in the superconducting state and the scattering of carriers in the strange-metal normal state. Remarkably, the scaling also applies for different iron-based and cuprate superconductors despite their distinct electronic structures and pairing symmetries. Such a correlation can be reproduced in a theoretical calculation on the two-dimensional Yukawa-Sachdev-Ye-Kitaev model by considering a cooperative effect of quantum critical fluctuation and disorder. These findings indicate a fundamental principle governing superconducting condensation and strange-metal scattering in unconventional superconductors. |
| title | Correlation between unconventional superconductivity and strange metallicity revealed by operando superfluid density measurements |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.18515 |