Giant odd-parity magnetoresistance from proximity-induced topological states

Giant odd-parity magnetoresistance from proximity-induced topological states | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Physical Sciences - Article Giant odd-parity magnetoresistance from proximity-induced topological states Le Duc Anh, Tomoki Hotta, Takahiro Chiba, Yohei Kota, Masaaki Tanaka This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6911783/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Magnetoresistance typically exhibits even symmetry with respect to the magnetic field, owing to time-reversal symmetry (TRS) as dictated by Onsager’s reciprocity relations. However, in certain systems where TRS is broken, magnetoresistance may acquire an odd component with respect to the magnetic field—referred to as odd-parity magnetoresistance (OMR). To date, reported OMR values have been modest, usually restricted to a few tens of percent even under high magnetic fields (e.g., 14 T). Here, we report the discovery of a giant OMR reaching up to 1,150% under a relatively low field of 1 T in a heterostructure composed of 3 nm-thick α-Sn and a ferromagnetic semiconductor, (In,Fe)Sb. Although α-Sn in this thickness range is a trivial narrow-gap semiconductor, analysis of Shubnikov–de Haas oscillations combined with ab initio calculations reveals the emergence of tilted topological surface states, induced via magnetic proximity from the (In,Fe)Sb layer. The observed OMR behavior is well explained by a Boltzmann transport model assuming the presence of oppositely tilted Weyl cones in the α-Sn band structure. Our findings not only shed new light on the physics of OMR but also suggest promising avenues for its application in electronic and spintronic devices, such as ultra-sensitive magnetic sensors. Physical sciences/Materials science/Condensed-matter physics/Topological matter/Topological insulators Physical sciences/Engineering/Electrical and electronic engineering Physical sciences/Materials science/Condensed-matter physics/Electronic properties and materials Physical sciences/Physics/Electronics, photonics and device physics/Electronic and spintronic devices Physical sciences/Nanoscience and technology/Nanoscale materials/Magnetic properties and materials Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementarySnOMR.pdf Supplementary Information Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6911783","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Physical Sciences - Article","associatedPublications":[],"authors":[{"id":480177820,"identity":"b9059ae4-5a70-43f1-9a4c-d95b3b9be3a4","order_by":0,"name":"Le Duc 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