Perfect superconducting diode effect in altermagnets
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866929459979878400 |
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| author | Chakraborty, Debmalya Black-Schaffer, Annica M. |
| author_facet | Chakraborty, Debmalya Black-Schaffer, Annica M. |
| contents | We investigate intrinsic superconducting diode effect in the unconventional superconducting state of $d$-wave altermagnets. We find large diode efficiencies in the wide-reaching finite-momentum pairing regimes of the phase diagram. Remarkably, even perfect diode efficiency of 100% can be obtained in the presence of an external magnetic field. We attribute the largest efficiencies to competition between multiple zero-momentum (BCS) and finite-momentum superconducting states, which is connected to a topological nodal-to-nodeless transition in altermagnets with magnetic field, making our results applicable to a wide range of altermagnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_07747 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Perfect superconducting diode effect in altermagnets Chakraborty, Debmalya Black-Schaffer, Annica M. Superconductivity Materials Science We investigate intrinsic superconducting diode effect in the unconventional superconducting state of $d$-wave altermagnets. We find large diode efficiencies in the wide-reaching finite-momentum pairing regimes of the phase diagram. Remarkably, even perfect diode efficiency of 100% can be obtained in the presence of an external magnetic field. We attribute the largest efficiencies to competition between multiple zero-momentum (BCS) and finite-momentum superconducting states, which is connected to a topological nodal-to-nodeless transition in altermagnets with magnetic field, making our results applicable to a wide range of altermagnets. |
| title | Perfect superconducting diode effect in altermagnets |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2408.07747 |