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Towards spintronics via tunneling through asymmetric barriers

arXiv Quantum Physics
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⚡ Quantum Brief
A team of Ukrainian physicists proposed a novel spintronic mechanism that generates directional spin currents without magnetic fields or spin-orbit coupling. Their theoretical model uses static, spin-independent asymmetric barriers in a 1D fermionic ring. The breakthrough demonstrates that asymmetric potential barriers alone can induce spin-resolved circulating currents, even from symmetric initial states. This challenges conventional spintronics approaches requiring direct spin manipulation. Resonant tuning of barrier asymmetry and initial state preparation can enhance or reverse the effect, offering dynamic control. The simplicity of the setup may enable more accessible spintronic device designs. The work suggests a fundamental link between geometric asymmetry and spin transport, potentially reducing reliance on complex materials. This could lower barriers to practical spintronic applications. Published in March 2026, the preprint presents a purely theoretical framework but opens avenues for experimental validation in quantum ring structures and spin-based information processing.
Towards spintronics via tunneling through asymmetric barriers

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Quantum Physics arXiv:2603.18187 (quant-ph) [Submitted on 18 Mar 2026] Title:Towards spintronics via tunneling through asymmetric barriers Authors:Elvira Bilokon, Valeriia Bilokon, Stanislava Litvinova, Denys I. Bondar, Andrii Sotnikov View a PDF of the paper titled Towards spintronics via tunneling through asymmetric barriers, by Elvira Bilokon and 4 other authors View PDF HTML (experimental) Abstract:Spin transport typically relies on direct manipulation of the spin degree of freedom via magnetic fields, spin-orbit coupling, or engineered spin-dependent potentials. We show theoretically that directional spin currents can arise in a relatively simple setting - a one-dimensional interacting fermionic ring with static, spin-independent asymmetric barriers. By introducing asymmetric potential barrier geometry, spin-resolved circulating currents emerge on a closed chain even for symmetric initial configurations. The effect can be enhanced or reversed by appropriate initial state preparation and tuning the barrier asymmetry to resonant conditions. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.18187 [quant-ph] (or arXiv:2603.18187v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.18187 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Elvira Bilokon [view email] [v1] Wed, 18 Mar 2026 18:34:30 UTC (5,512 KB) Full-text links: Access Paper: View a PDF of the paper titled Towards spintronics via tunneling through asymmetric barriers, by Elvira Bilokon and 4 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: 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?) Links to Code Toggle Papers with Code (What is Papers with Code?) 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?) 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?)

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Source: arXiv Quantum Physics