Observation of Electronic Viscous Dissipation in Graphene Magneto-thermal Transport

Observation of Electronic Viscous Dissipation in Graphene Magneto-thermal Transport | 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 Article Observation of Electronic Viscous Dissipation in Graphene Magneto-thermal Transport Philip Kim, Artem Talanov, Jonah Waissman, Aaron Hui, Brian Skinner, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5466607/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 Hydrodynamics describes the collective transport of strongly-interacting particles. Due to enhanced electron-electron interactions at elevated temperatures, the behavior of electrons in clean graphene can be depicted as a hydrodynamic flow of charge. In this new regime, the well-known rules of Ohmic transport no longer apply, necessitating the consideration of collective electron dynamics. In particular, the hydrodynamic analogues of Joule heating and thermal transport require consideration of the electronic viscosity and associated energy dissipation, but remain unexplored. In this work, we probe graphene via thermal transport measurement in small magnetic fields and find an unexpected enhancement of cooling in Corbino geometries. We construct a theory that identifies the origin of this effect in viscous dissipation of the electron fluid, enabling a new measurement of the electronic viscosity and underlying microscopic thermal and electrical conductivities. This analysis reveals the Lorenz ratio of the graphene electronic fluid, which is shown to be strongly suppressed away from charge neutrality compared to the Wiedemann-Franz value, in agreement with longstanding expectations for the hydrodynamic regime. Our results demonstrate viscous electronic heating in an electron fluid, offering a new, transport-based methodology for identifying hydrodynamic states in other material systems, and providing insight for thermal management in electronic hydrodynamic devices. Physical sciences/Physics/Condensed-matter physics/Electronic properties and materials Physical sciences/Physics/Condensed-matter physics/Quantum fluids and solids Full Text Additional Declarations There is NO Competing Interest. Supplementary Files ViscousCorbinoSI.pdf Supplementary Information for Observation of Electronic Viscous Dissipation in Graphene Magneto-thermal Transport 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-5466607","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":576838220,"identity":"998fc703-1b74-4ea4-a5eb-7ce9b0e99478","order_by":0,"name":"Philip 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