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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2502.06420 |
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| _version_ | 1866915144647311360 |
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| author | Levitin, Lev V. Knapp, Jan Knappová, Petra Lucas, Marijn Nyéki, Ján Heikkinen, Petri Antonov, Vladimir Casey, Andrew Ho, Andrew F. Coleman, Piers Geibel, Christoph Steppke, Alexander Kliemt, Kristin Krellner, Cornelius Brando, Manuel Saunders, John |
| author_facet | Levitin, Lev V. Knapp, Jan Knappová, Petra Lucas, Marijn Nyéki, Ján Heikkinen, Petri Antonov, Vladimir Casey, Andrew Ho, Andrew F. Coleman, Piers Geibel, Christoph Steppke, Alexander Kliemt, Kristin Krellner, Cornelius Brando, Manuel Saunders, John |
| contents | Topological superconductors are essential elements of the periodic table of topological quantum matter. However, the relevant odd-parity spin-triplet superconductors are rare. We report high-resolution measurements of the complex electrical impedance of YbRh$_2$Si$_2$ down to 0.4 mK, that reveal the presence of several superconducting states, suppressed differently by magnetic field, both Pauli-limited and beyond the Pauli limit. Superconductivity is abruptly switched off at the critical field of the primary antiferromagnetic order. The onset of electro-nuclear spin density wave order enhances the superconductivity, which we account for by the simultaneous formation of a spin-triplet pair density wave. Together these observations provide compelling evidence for odd-parity superconductivity, and its underpinning by antiferromagnetism, and allow us to identify the topological helical state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_06420 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Odd-parity superconductivity underpinned by antiferromagnetism in heavy fermion metal YbRh$_2$Si$_2$ Levitin, Lev V. Knapp, Jan Knappová, Petra Lucas, Marijn Nyéki, Ján Heikkinen, Petri Antonov, Vladimir Casey, Andrew Ho, Andrew F. Coleman, Piers Geibel, Christoph Steppke, Alexander Kliemt, Kristin Krellner, Cornelius Brando, Manuel Saunders, John Superconductivity Strongly Correlated Electrons Topological superconductors are essential elements of the periodic table of topological quantum matter. However, the relevant odd-parity spin-triplet superconductors are rare. We report high-resolution measurements of the complex electrical impedance of YbRh$_2$Si$_2$ down to 0.4 mK, that reveal the presence of several superconducting states, suppressed differently by magnetic field, both Pauli-limited and beyond the Pauli limit. Superconductivity is abruptly switched off at the critical field of the primary antiferromagnetic order. The onset of electro-nuclear spin density wave order enhances the superconductivity, which we account for by the simultaneous formation of a spin-triplet pair density wave. Together these observations provide compelling evidence for odd-parity superconductivity, and its underpinning by antiferromagnetism, and allow us to identify the topological helical state. |
| title | Odd-parity superconductivity underpinned by antiferromagnetism in heavy fermion metal YbRh$_2$Si$_2$ |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.06420 |