Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866929443233071104 |
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| author | Profe, Jonas B. Beck, Sophie Kennes, Dante M. Georges, Antoine Gingras, Olivier |
| author_facet | Profe, Jonas B. Beck, Sophie Kennes, Dante M. Georges, Antoine Gingras, Olivier |
| contents | The pairing symmetry of Sr$_2$RuO$_4$ is a long-standing fundamental question in the physics of superconducting materials with strong electronic correlations. We use the functional renormalization group to investigate the behavior of superconductivity under uniaxial strain in a two-dimensional realistic model of Sr$_2$RuO$_4$ obtained with density functional theory and incorporating the effect of spin-orbit coupling. We find a dominant $d_{x^2-y^2}$ superconductor mostly hosted by the $d_{xy}$-orbital, with no other closely competing superconducting state. Within this framework we reproduce the experimentally observed enhancement of the critical temperature under strain and propose a simple mechanism driven by the density of states to explain our findings. We also investigate the competition between superconductivity and spin-density wave ordering as a function of interaction strength. By comparing theory and experiment, we discuss constraints on a possible degenerate partner of the $d_{x^2-y^2}$ superconducting state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_10006 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4 Profe, Jonas B. Beck, Sophie Kennes, Dante M. Georges, Antoine Gingras, Olivier Superconductivity Strongly Correlated Electrons The pairing symmetry of Sr$_2$RuO$_4$ is a long-standing fundamental question in the physics of superconducting materials with strong electronic correlations. We use the functional renormalization group to investigate the behavior of superconductivity under uniaxial strain in a two-dimensional realistic model of Sr$_2$RuO$_4$ obtained with density functional theory and incorporating the effect of spin-orbit coupling. We find a dominant $d_{x^2-y^2}$ superconductor mostly hosted by the $d_{xy}$-orbital, with no other closely competing superconducting state. Within this framework we reproduce the experimentally observed enhancement of the critical temperature under strain and propose a simple mechanism driven by the density of states to explain our findings. We also investigate the competition between superconductivity and spin-density wave ordering as a function of interaction strength. By comparing theory and experiment, we discuss constraints on a possible degenerate partner of the $d_{x^2-y^2}$ superconducting state. |
| title | Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4 |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.10006 |