Odd-frequency pairing in josephson junctions coupled by magnetic textures
Josephson junctions (JJs) coupled through magnetic textures provide a controllable platform for odd-frequency superconductivityand Majorana physics. Within a tight-binding Green function framework, induced pair correlations and spectral propertiesare analyzed under various magnetic and geometric con...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/743080 |
| Acesso em linha: | https://hdl.handle.net/10486/743080 https://dx.doi.org/10.1002/pssr.202500413 |
| Access Level: | acceso abierto |
| Palavra-chave: | josephson junctions odd-frequency superconductivity majorana bound states topological superconductors Física |
| Resumo: | Josephson junctions (JJs) coupled through magnetic textures provide a controllable platform for odd-frequency superconductivityand Majorana physics. Within a tight-binding Green function framework, induced pair correlations and spectral propertiesare analyzed under various magnetic and geometric conditions. When the junction is in the topologically trivial regime, even-frequency singlet pairing is dominant, whereas the topological phase is characterized by the coexistence of Majorana bound statesand robust odd-frequency equal-spin triplet pairing at the interface edges. The odd-frequency polarized triplets reveal a divergent1=ω behavior when the Majorana states are decoupled, which is intrinsically connected to their self-conjugation property. Thezero-frequency divergence evolves into shifted resonances and linear low-frequency behavior once hybridization occurs. A non-magnetic interruption in the texture separates the topological superconductor into two topological segments and generates addi-tional inner Majorana modes. When the nonmagnetic barrier is comparable to the inner Majorana states localization length, theyhybridize and modify their associated odd-frequency triplet pairing, while the outer edge modes preserve their self-conjugatednature. Tuning the superconducting phase difference further controls the onset of the topological regime and the stability oflocalized Majorana states. The results highlight the central role of odd-frequency triplet correlations as a probe of topologicalsuperconductivity in magnetically engineered JJs |
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