On the superconducting gap structure of the miassite Rh17S15: Nodal or nodeless?
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866910446681849856 |
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| author | Nie, J. Y. Zhao, C. C. Xu, C. Q. Li, B. Tu, C. P. Zhang, X. Dai, D. Z. Wang, H. R. Xu, S. Jiao, Wenhe Wang, B. M. Xu, Zhu'an Xu, Xiaofeng Li, S. Y. |
| author_facet | Nie, J. Y. Zhao, C. C. Xu, C. Q. Li, B. Tu, C. P. Zhang, X. Dai, D. Z. Wang, H. R. Xu, S. Jiao, Wenhe Wang, B. M. Xu, Zhu'an Xu, Xiaofeng Li, S. Y. |
| contents | Recent penetration depth measurement claimed the observation of unconventional superconductivity in the miassite Rh$_{17}$S$_{15}$ single crystals, evidenced by the linear-in-temperature penetration depth at low temperatures, thereby arguing for the presence of the lines of node in its superconducting gap structure. Here we measure the thermal conductivity of Rh$_{17}$S$_{15}$ single crystals down to 110 mK and up to a field of 8 T ($\simeq 0.4H{\rm_{c2}}$). In marked contrast to the penetration depth measurement, we observe a negligible residual linear term $κ_0/T$ in zero field, in line with the nodeless gap structure. The field dependence of $κ_0(H)/T$ shows a profile that is more consistent with either a highly anisotropic gap structure or multiple nodeless gaps with significantly different magnitudes. Moreover, first-principles calculations give two electronic bands with complex shape of Fermi surfaces. These results suggest multigap nodeless superconductivity in this multiband Rh$_{17}$S$_{15}$ superconductor. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_08633 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the superconducting gap structure of the miassite Rh17S15: Nodal or nodeless? Nie, J. Y. Zhao, C. C. Xu, C. Q. Li, B. Tu, C. P. Zhang, X. Dai, D. Z. Wang, H. R. Xu, S. Jiao, Wenhe Wang, B. M. Xu, Zhu'an Xu, Xiaofeng Li, S. Y. Superconductivity Materials Science Strongly Correlated Electrons Recent penetration depth measurement claimed the observation of unconventional superconductivity in the miassite Rh$_{17}$S$_{15}$ single crystals, evidenced by the linear-in-temperature penetration depth at low temperatures, thereby arguing for the presence of the lines of node in its superconducting gap structure. Here we measure the thermal conductivity of Rh$_{17}$S$_{15}$ single crystals down to 110 mK and up to a field of 8 T ($\simeq 0.4H{\rm_{c2}}$). In marked contrast to the penetration depth measurement, we observe a negligible residual linear term $κ_0/T$ in zero field, in line with the nodeless gap structure. The field dependence of $κ_0(H)/T$ shows a profile that is more consistent with either a highly anisotropic gap structure or multiple nodeless gaps with significantly different magnitudes. Moreover, first-principles calculations give two electronic bands with complex shape of Fermi surfaces. These results suggest multigap nodeless superconductivity in this multiband Rh$_{17}$S$_{15}$ superconductor. |
| title | On the superconducting gap structure of the miassite Rh17S15: Nodal or nodeless? |
| topic | Superconductivity Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2405.08633 |