Towards spintronics via tunneling through asymmetric barriers

Quantum Physics [Submitted on 18 Mar 2026] Towards spintronics via tunneling through asymmetric barriers Elvira Bilokon, Valeriia Bilokon, Stanislava Litvinova, Denys I. Bondar, Andrii Sotnikov 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: 5 pages, 4 figures 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 Submission history From: Elvira Bilokon [view email] [v1] Wed, 18 Mar 2026 18:34:30 UTC (5,512 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADS 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 Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)