Ambient-Pressure Room-Temperature Superconductivity in Ternary YHf2H24 Nanoribbons Acoustic Phonon Pumping: A Comprehensive Theoretical Prediction

Ambient-Pressure Room-Temperature Superconductivity in Ternary YHf2H24 Nanoribbons Acoustic Phonon Pumping: A Comprehensive Theoretical Prediction | 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 Ambient-Pressure Room-Temperature Superconductivity in Ternary YHf2H24 Nanoribbons Acoustic Phonon Pumping: A Comprehensive Theoretical Prediction Andres Pirolo This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8348004/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Achieving room-temperature superconductivity in hydrides typically requires prohibitive pressures exceeding 150 GPa to stabilize the hydrogen clathrate structure. Here, we propose a non-equilibrium pathway to stabilize the superconducting phase of Yttrium-Hafnium Hydride (YHf₂H₂₄) at ambient pressure using a resonant acoustic drive. By targeting the hydrogen sublattice with a 45 GHz acoustic standing wave—derived from mass-scaling the acoustic modes of H₂₄ cages—we induce a parametric renormalization of the electron-phonon coupling constant (λ). Theoretical modeling based on the modified Allen-Dynes equation predicts a critical temperature T_c ≈ 298 K (25°C) with a drive amplitude of 7.5%, enabling operation at standard room temperature without any cooling requirements. Furthermore, we calculate the charge transport limits of this dynamically driven state. With a massive superconducting gap Δ ≈ 45 meV (f_gap ≈ 21.8 THz), a single nanoribbon interconnect supports a conservative data rate of 10.93 Tbps, outperforming PCIe 7.0 copper standards by a factor of >80 while eliminating Joule heating. This 'Living Cable' architecture offers a scalable solution for exascale computing and consumer electronics without cryogenic cooling. To ensure robustness, we include detailed derivations, comparisons to recent ternary hydride advances, and discussions on potential experimental challenges, making this prediction consistent within current theoretical frameworks. Physical sciences/Materials science/Condensed-matter physics/Electronic properties and materials Physical sciences/Energy science and technology/Thermoelectric devices and materials Room-temperature superconductivity Ambient-pressure superconductivity Ternary hydrides Non equilibrium phonon pumping Acoustic drive Electron-phonon coupling Exascale computing Full Text Additional Declarations There is NO Competing Interest. Cite Share Download PDF Status: Posted 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-8348004","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":563005912,"identity":"1a52f1e4-8342-40fd-ae42-c085479fa160","order_by":0,"name":"Andres Pirolo","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAyklEQVRIie3RMQuCQBTA8Xe4Cq0GcfcVnrT6YXTJJaHRUTiwsdXwU/QNCqFJmgVvSAJngwbHrrKh6dkWdP/tjvfjeByAyfSTsQRgBRyc52k/liDMvyGPEIJkNJnkMu069MJNLs/sFit9QzBHHeQ2w0WUqSNas7IF5+QTz1SBtGwsoqRagjVNC4CSEGIgoXgTQREciI+asKsmSBFX78L0Lu5O71JA2douRXi9vkAXe4LXsmn6WHFOkeEHXxU2gE2BT8J6et5kMpn+sDuNgUaed4kEfAAAAABJRU5ErkJggg==","orcid":"","institution":"EEST N1 Moron","correspondingAuthor":true,"prefix":"","firstName":"Andres","middleName":"","lastName":"Pirolo","suffix":""}],"badges":[],"createdAt":"2025-12-12 17:36:18","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8348004/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8348004/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":101881407,"identity":"a8f0fb86-f3c3-4983-8fe4-18be4782a986","added_by":"auto","created_at":"2026-02-04 15:11:57","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":518318,"visible":true,"origin":"","legend":"Article File","description":"","filename":"Pirolo2025AmbientSuperconductorYHf2H24.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8348004/v1_covered_17229e41-9a64-44e1-8a1c-83548046e704.pdf"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"Ambient-Pressure Room-Temperature Superconductivity in Ternary\nYHf2H24 Nanoribbons Acoustic Phonon Pumping: A\nComprehensive Theoretical Prediction","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Room-temperature superconductivity, Ambient-pressure superconductivity, Ternary hydrides, Non equilibrium phonon pumping, Acoustic drive, Electron-phonon coupling, Exascale computing","lastPublishedDoi":"10.21203/rs.3.rs-8348004/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8348004/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Achieving room-temperature superconductivity in hydrides typically requires prohibitive pressures exceeding 150 GPa to stabilize the hydrogen clathrate structure. Here, we propose a non-equilibrium pathway to stabilize the superconducting phase of Yttrium-Hafnium Hydride (YHf₂H₂₄) at ambient pressure using a resonant acoustic drive. By targeting the hydrogen sublattice with a 45 GHz acoustic standing wave—derived from mass-scaling the acoustic modes of H₂₄ cages—we induce a parametric renormalization of the electron-phonon coupling constant (λ). Theoretical modeling based on the modified Allen-Dynes equation predicts a critical temperature T_c ≈ 298 K (25°C) with a drive amplitude of 7.5%, enabling operation at standard room temperature without any cooling requirements. Furthermore, we calculate the charge transport limits of this dynamically driven state. With a massive superconducting gap Δ ≈ 45 meV (f_gap ≈ 21.8 THz), a single nanoribbon interconnect supports a conservative data rate of 10.93 Tbps, outperforming PCIe 7.0 copper standards by a factor of \u003e80 while eliminating Joule heating. This 'Living Cable' architecture offers a scalable solution for exascale computing and consumer electronics without cryogenic cooling. 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