Nodeless multigap superconductivity in organic-ion-intercalated (tetrabutyl~ammonium)$_{0.3}$FeSe
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914966521511936 |
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| author | Wu, Jinyu Shi, Mengzhu Shu, Jianwei Shan, Zhaoyang Shiroka, Toni Adroja, Devashibhai Chen, Xianhui Smidman, Michael |
| author_facet | Wu, Jinyu Shi, Mengzhu Shu, Jianwei Shan, Zhaoyang Shiroka, Toni Adroja, Devashibhai Chen, Xianhui Smidman, Michael |
| contents | We probe the superconducting order parameter of the organic-ion-intercalated FeSe-based superconductor (tetrabutyl ammonium)$_{0.3}$FeSe [(TBA)$_{0.3}$FeSe] using muon-spin relaxation/rotation ($μ$SR). Zero-field $μ$SR measurements show only a weak temperature dependence with no evidence for magnetic ordering or broken time-reversal symmetry in the superconducting state. The temperature dependence of the superfluid density is deduced from transverse-field $μ$SR measurements with fields applied both parallel and perpendicular to the $c$~axis axis, and can be well described by a nodeless two-gap $s+s$ wave model. These properties are reminiscent of those of (Li$_{1-x}$Fe$_x$)OHFe$_{1-y}$Se, which also has a comparably enhanced $T_c$, suggesting that such a gap structure is a common feature of quasi-two-dimensional intercalated FeSe-based superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_04781 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nodeless multigap superconductivity in organic-ion-intercalated (tetrabutyl~ammonium)$_{0.3}$FeSe Wu, Jinyu Shi, Mengzhu Shu, Jianwei Shan, Zhaoyang Shiroka, Toni Adroja, Devashibhai Chen, Xianhui Smidman, Michael Superconductivity Strongly Correlated Electrons We probe the superconducting order parameter of the organic-ion-intercalated FeSe-based superconductor (tetrabutyl ammonium)$_{0.3}$FeSe [(TBA)$_{0.3}$FeSe] using muon-spin relaxation/rotation ($μ$SR). Zero-field $μ$SR measurements show only a weak temperature dependence with no evidence for magnetic ordering or broken time-reversal symmetry in the superconducting state. The temperature dependence of the superfluid density is deduced from transverse-field $μ$SR measurements with fields applied both parallel and perpendicular to the $c$~axis axis, and can be well described by a nodeless two-gap $s+s$ wave model. These properties are reminiscent of those of (Li$_{1-x}$Fe$_x$)OHFe$_{1-y}$Se, which also has a comparably enhanced $T_c$, suggesting that such a gap structure is a common feature of quasi-two-dimensional intercalated FeSe-based superconductors. |
| title | Nodeless multigap superconductivity in organic-ion-intercalated (tetrabutyl~ammonium)$_{0.3}$FeSe |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.04781 |