Spin-polarized Andreev molecules and anomalous nonlocal Josephson effects in altermagnetic junctions

[2603.04954] Spin-polarized Andreev molecules and anomalous nonlocal Josephson effects in altermagnetic junctions Skip to main content Search Submit Donate Log in Condensed Matter > Superconductivity arXiv:2603.04954 (cond-mat) [Submitted on 5 Mar 2026 ( v1 ), last revised 25 Aug 2026 (this version, v2)] Title: Spin-polarized Andreev molecules and anomalous nonlocal Josephson effects in altermagnetic junctions Authors: Sayan Mondal , Jorge Cayao View PDF HTML (experimental) Abstract: Altermagnetism has emerged as a promising ingredient for realizing nontrivial Josephson phases, but so far explored in single Josephson junctions. In this work, we consider the coherent coupling of two Josephson junctions with spin-singlet $s$-wave superconductivity and demonstrate that $d$-wave altermagnetism gives rise to spin-polarized Andreev molecules due to the hybridization of Andreev bound states of each junction when the coupling is weak. Interestingly, these spin-polarized Andreev molecules induce an anomalous nonlocal Josephson effect, where the current flow across one Josephson junction due to phase changes across the other junction develops $0-\pi$ and $\phi_{0}$ transitions originating from altermagnetism. Furthermore, the nonlocal Josephson current carried by spin-polarized Andreev molecules exhibits nonreciprocal critical currents, enabling a nonlocal Josephson diode effect whose polarity is tunable by the altermagnetic strength and right phase. Our findings put forward altermagnetism as a promising arena for designing nonlocal spin Josephson phenomena. Subjects: Superconductivity (cond-mat.supr-con) ; Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Cite as: arXiv:2603.04954 [cond-mat.supr-con] (or arXiv:2603.04954v2 [cond-mat.supr-con] for this version) https://doi.org/10.48550/arXiv.2603.04954 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. Research 8, 033223 (2026) Related DOI : https://doi.org/10.1103/l42w-8qrz Focus to learn more DOI(s) linking to related resources Submission history From: Sayan Mondal [ view email ] [v1] Thu, 5 Mar 2026 08:49:13 UTC (4,477 KB) [v2] Tue, 25 Aug 2026 10:06:45 UTC (4,478 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: cond-mat.supr-con < prev | next > new | recent | 2026-03 Change to browse by: cond-mat cond-mat.mes-hall References & Citations SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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