$T_c$ and the elastocaloric effect of Sr$_2$RuO$_4$ under $\langle 110 \rangle$ uniaxial stress: no indications of transition splitting
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2024
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| author | Jerzembeck, Fabian Li, You-Sheng Palle, Grgur Hu, Zhenhai Biderang, Mehdi Kikugawa, Naoki Sokolov, Dmitry A. Ghosh, Sayak Ramshaw, Brad J. Scaffidi, Thomas Nicklas, Michael Schmalian, Jörg Mackenzie, Andrew P. Hicks, Clifford W. |
| author_facet | Jerzembeck, Fabian Li, You-Sheng Palle, Grgur Hu, Zhenhai Biderang, Mehdi Kikugawa, Naoki Sokolov, Dmitry A. Ghosh, Sayak Ramshaw, Brad J. Scaffidi, Thomas Nicklas, Michael Schmalian, Jörg Mackenzie, Andrew P. Hicks, Clifford W. |
| contents | There is considerable evidence that the superconductivity of Sr2RuO4 has two components. Among this evidence is a jump in the shear elastic modulus $c_{66}$ at the critical temperature $T_c$, observed in ultrasound measurements. Such a jump is forbidden for homogeneous single-component order parameters, and implies that $T_c$ should develop as a cusp under the application of shear strain with $\langle 110 \rangle$ principal axes. This shear strain should split the onset temperatures of the two components, if they coexist, or select one component if they do not. Here, we report measurements of $T_c$ and the elastocaloric effect of Sr2RuO4 under uniaxial stress applied along the $[110]$ lattice direction. Within experimental resolution, we resolve neither a cusp in the stress dependence of $T_c$, nor any second transition in the elastocaloric effect data. We show that reconciling these null results with the observed jumps in $c_{66}$ requires extraordinarily fine tuning to a triple point of the Ginzburg-Landau parameter space. In addition, our results are inconsistent with homogeneous time reversal symmetry breaking at a temperature $T_2 \leq T_c$ as identified in muon spin relaxation experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_04717 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $T_c$ and the elastocaloric effect of Sr$_2$RuO$_4$ under $\langle 110 \rangle$ uniaxial stress: no indications of transition splitting Jerzembeck, Fabian Li, You-Sheng Palle, Grgur Hu, Zhenhai Biderang, Mehdi Kikugawa, Naoki Sokolov, Dmitry A. Ghosh, Sayak Ramshaw, Brad J. Scaffidi, Thomas Nicklas, Michael Schmalian, Jörg Mackenzie, Andrew P. Hicks, Clifford W. Superconductivity Strongly Correlated Electrons There is considerable evidence that the superconductivity of Sr2RuO4 has two components. Among this evidence is a jump in the shear elastic modulus $c_{66}$ at the critical temperature $T_c$, observed in ultrasound measurements. Such a jump is forbidden for homogeneous single-component order parameters, and implies that $T_c$ should develop as a cusp under the application of shear strain with $\langle 110 \rangle$ principal axes. This shear strain should split the onset temperatures of the two components, if they coexist, or select one component if they do not. Here, we report measurements of $T_c$ and the elastocaloric effect of Sr2RuO4 under uniaxial stress applied along the $[110]$ lattice direction. Within experimental resolution, we resolve neither a cusp in the stress dependence of $T_c$, nor any second transition in the elastocaloric effect data. We show that reconciling these null results with the observed jumps in $c_{66}$ requires extraordinarily fine tuning to a triple point of the Ginzburg-Landau parameter space. In addition, our results are inconsistent with homogeneous time reversal symmetry breaking at a temperature $T_2 \leq T_c$ as identified in muon spin relaxation experiments. |
| title | $T_c$ and the elastocaloric effect of Sr$_2$RuO$_4$ under $\langle 110 \rangle$ uniaxial stress: no indications of transition splitting |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2406.04717 |