Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4}
Strontium ruthenate (Sr_{2}RuO_{4}) has long been thought to host a spin-triplet chiral p-wave superconducting state. However, the singletlike response observed in recent spin-susceptibility measurements casts serious doubts on this pairing state. Together with the evidence for broken time-reversal...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.032023 |
| _version_ | 1797211354543685632 |
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| author | Han Gyeol Suh Henri Menke P. M. R. Brydon Carsten Timm Aline Ramires Daniel F. Agterberg |
| author_facet | Han Gyeol Suh Henri Menke P. M. R. Brydon Carsten Timm Aline Ramires Daniel F. Agterberg |
| author_sort | Han Gyeol Suh |
| collection | DOAJ |
| description | Strontium ruthenate (Sr_{2}RuO_{4}) has long been thought to host a spin-triplet chiral p-wave superconducting state. However, the singletlike response observed in recent spin-susceptibility measurements casts serious doubts on this pairing state. Together with the evidence for broken time-reversal symmetry and a jump in the shear modulus c_{66} at the superconducting transition temperature, the available experiments point towards an even-parity chiral superconductor with k_{z}(k_{x}±ik_{y})-like E_{g} symmetry, which has consistently been dismissed based on the quasi-two-dimensional electronic structure of Sr_{2}RuO_{4}. Here, we show how the orbital degree of freedom can encode the two-component nature of the E_{g} order parameter, allowing for a local orbital-antisymmetric spin-triplet state that can be stabilized by on-site Hund's coupling. We find that this exotic E_{g} state can be energetically stable once a complete, realistic three-dimensional model is considered, within which momentum-dependent spin-orbit coupling terms are key. This state naturally gives rise to Bogoliubov Fermi surfaces. |
| first_indexed | 2024-04-24T10:25:09Z |
| format | Article |
| id | doaj.art-ad2500f26a78482c8b9e8103c88142f7 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:09Z |
| publishDate | 2020-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-ad2500f26a78482c8b9e8103c88142f72024-04-12T16:57:29ZengAmerican Physical SocietyPhysical Review Research2643-15642020-07-012303202310.1103/PhysRevResearch.2.032023Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4}Han Gyeol SuhHenri MenkeP. M. R. BrydonCarsten TimmAline RamiresDaniel F. AgterbergStrontium ruthenate (Sr_{2}RuO_{4}) has long been thought to host a spin-triplet chiral p-wave superconducting state. However, the singletlike response observed in recent spin-susceptibility measurements casts serious doubts on this pairing state. Together with the evidence for broken time-reversal symmetry and a jump in the shear modulus c_{66} at the superconducting transition temperature, the available experiments point towards an even-parity chiral superconductor with k_{z}(k_{x}±ik_{y})-like E_{g} symmetry, which has consistently been dismissed based on the quasi-two-dimensional electronic structure of Sr_{2}RuO_{4}. Here, we show how the orbital degree of freedom can encode the two-component nature of the E_{g} order parameter, allowing for a local orbital-antisymmetric spin-triplet state that can be stabilized by on-site Hund's coupling. We find that this exotic E_{g} state can be energetically stable once a complete, realistic three-dimensional model is considered, within which momentum-dependent spin-orbit coupling terms are key. This state naturally gives rise to Bogoliubov Fermi surfaces.http://doi.org/10.1103/PhysRevResearch.2.032023 |
| spellingShingle | Han Gyeol Suh Henri Menke P. M. R. Brydon Carsten Timm Aline Ramires Daniel F. Agterberg Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} Physical Review Research |
| title | Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} |
| title_full | Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} |
| title_fullStr | Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} |
| title_full_unstemmed | Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} |
| title_short | Stabilizing even-parity chiral superconductivity in Sr_{2}RuO_{4} |
| title_sort | stabilizing even parity chiral superconductivity in sr 2 ruo 4 |
| url | http://doi.org/10.1103/PhysRevResearch.2.032023 |
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