Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures
Proximity effect at superconductor/antiferromagnet (S/AF) interfaces, which manifests itself as generation of Néel-type triplet correlations, leads to sensitivity of the superconducting critical temperature to the mutual orientation of the AF Néel vectors in AF/S/AF trilayers, which is called the sp...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/716757 |
| Acceso en línea: | http://hdl.handle.net/10486/716757 https://dx.doi.org/10.1103/PhysRevB.109.184504 |
| Access Level: | acceso abierto |
| Palabra clave: | Magnetic devices magnetoresistance temperature antiferromagnets finite momentum Física |
| Sumario: | Proximity effect at superconductor/antiferromagnet (S/AF) interfaces, which manifests itself as generation of Néel-type triplet correlations, leads to sensitivity of the superconducting critical temperature to the mutual orientation of the AF Néel vectors in AF/S/AF trilayers, which is called the spin-valve effect. Here we predict that the spin-valve effect in AF/S/AF heterostructures crucially depends on the value of the chemical potential of the superconducting interlayer due to the occurrence of the finite-momentum Néel triplet correlations. In addition, we investigate equal-spin-triplet correlations, which appear in AF/S/AF structures for nonaligned Néel vectors of the AFs, and their role in the nonmonotonic dependence of the superconducting critical temperature of the AF/S/AF structure on the mutual orientation of the AF Néel vectors. The influence of impurities on the spin-valve effect is also investigated |
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