Pseudogap Characteristics in Bi1.6Pb0.4Sr2Ca2Cu3O10+δ Superconductor added with Al2O3–15wt%ZrO2 Nanocomposite

Pseudogap Characteristics in Bi1.6Pb0.4Sr2Ca2Cu3O10+δ Superconductor added with Al2O3–15wt%ZrO2 Nanocomposite | 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 Research Article Pseudogap Characteristics in Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10+δ Superconductor added with Al 2 O 3 –15wt%ZrO 2 Nanocomposite Ali Aftabi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5269192/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 This study, employing the local pair model, examines how the Al 2 O 3 –15wt%ZrO 2 nanocomposite affects the pseudogap peculiarities and temperature dependence of fluctuation-induced conductivity in the Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10+δ superconductor. The fluctuation-induced conductivity survey reveals that the experimental data for both undoped samples and those doped with low concentrations (0.0–1.0 wt%) of the Al 2 O 3 –15wt%ZrO 2 nanocomposite are well explained by the 3D Aslamazov-Larkin (AL) and 2D Maki-Thompson (MT) models, with 2D fluctuations being the most significant in all samples. The results indicate that samples with 0.1 and 0.2 wt% additives exhibit a wider region of 2D fluctuations than the undoped sample. This suggests that a minor addition of nanocomposite promotes the formation of phase-coherent fluctuating Cooper pairs. The value and temperature variation of the pseudogap Δ*(T) for different composites were deduced using the local pairs model based on experimental fluctuation-induced conductivity data. It was observed that the transition temperature from the Bose-Einstein condensate (BEC) to Bardeen-Cooper-Schrieffer (BCS) regimes of local pairs, T pair , rose from 117.5 K at the undoped sample to approximately 133.5 K at the composite containing 0.2 wt% additive. However, with higher additive concentrations, T pair decreased, reaching 120.5 K at the composite containing 1.0 wt% additive. The estimated superconducting gap value at T = 0, Δ(0), rose from 250 K (21.5 meV) for the undoped sample to 254 K (21.9 meV) at the composite including 0.2 wt% additive, then dropped to 243 K (20.9 meV) at the composite including 1.0 wt% additive. Electronic Materials and Devices Hard Condensed-matter Physics Fluctuation induced conductivity Pseudogap Bismuth based superconductor Nanocomposite High-temperature superconductors Full Text Additional Declarations The authors declare no competing interests. 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-5269192","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":366333116,"identity":"362a18b2-9c0e-44ca-a1d8-005c3acf9b48","order_by":0,"name":"Ali Aftabi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA7UlEQVRIiWNgGAWjYJCCDwwMB3j42ZsPANkSMsToYJxxAKhFsudYAkgLD9FaGAxm5BiAeIS18DcwP2z+UHNHxoAh5/OrGzUWPAzsh49uwKdF4gCbYcOBY894zBnObrPOOQZ0GE9a2g281hxgMH9wgO0wj2Vj7zbjHDagFgkeM7xa5A+wf2w48O8wj8FhnmfGOf+I0GJwgMew4WAbUMsxHubHuW1EaDE8zFPYcLbvGTCQ2cyYc/skeNgI+UXuePvGhopvd+z55R8//pzzrU6On/3wMfzeZ0Yw2STAJF7l6Lo/kKJ6FIyCUTAKRg4AAFcSTTq2gzU9AAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0002-9823-6614","institution":"Department of Physics, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran","correspondingAuthor":true,"prefix":"","firstName":"Ali","middleName":"","lastName":"Aftabi","suffix":""}],"badges":[],"createdAt":"2024-10-15 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Al\u003c/strong\u003e\u003csub\u003e\u003cstrong\u003e2\u003c/strong\u003e\u003c/sub\u003e\u003cstrong\u003eO\u003c/strong\u003e\u003csub\u003e\u003cstrong\u003e3\u003c/strong\u003e\u003c/sub\u003e\u003cstrong\u003e–15wt%ZrO\u003c/strong\u003e\u003csub\u003e\u003cstrong\u003e2\u003c/strong\u003e\u003c/sub\u003e\u003cstrong\u003e Nanocomposite\u003c/strong\u003e\u003c/p\u003e","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":"Fluctuation induced conductivity, Pseudogap, Bismuth based superconductor, Nanocomposite, High-temperature superconductors","lastPublishedDoi":"10.21203/rs.3.rs-5269192/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5269192/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis study, employing the local pair model, examines how the Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e\u0026ndash;15wt%ZrO\u003csub\u003e2\u003c/sub\u003e nanocomposite affects the pseudogap peculiarities and temperature dependence of fluctuation-induced conductivity in the Bi\u003csub\u003e1.6\u003c/sub\u003ePb\u003csub\u003e0.4\u003c/sub\u003eSr\u003csub\u003e2\u003c/sub\u003eCa\u003csub\u003e2\u003c/sub\u003eCu\u003csub\u003e3\u003c/sub\u003eO\u003csub\u003e10+δ\u003c/sub\u003e superconductor. The fluctuation-induced conductivity survey reveals that the experimental data for both undoped samples and those doped with low concentrations (0.0\u0026ndash;1.0 wt%) of the Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e\u0026ndash;15wt%ZrO\u003csub\u003e2\u003c/sub\u003e nanocomposite are well explained by the 3D Aslamazov-Larkin (AL) and 2D Maki-Thompson (MT) models, with 2D fluctuations being the most significant in all samples. The results indicate that samples with 0.1 and 0.2 wt% additives exhibit a wider region of 2D fluctuations than the undoped sample. This suggests that a minor addition of nanocomposite promotes the formation of phase-coherent fluctuating Cooper pairs. The value and temperature variation of the pseudogap Δ*(T) for different composites were deduced using the local pairs model based on experimental fluctuation-induced conductivity data. It was observed that the transition temperature from the Bose-Einstein condensate (BEC) to Bardeen-Cooper-Schrieffer (BCS) regimes of local pairs, T\u003csub\u003epair\u003c/sub\u003e, rose from 117.5 K at the undoped sample to approximately 133.5 K at the composite containing 0.2 wt% additive. However, with higher additive concentrations, T\u003csub\u003epair\u003c/sub\u003e decreased, reaching 120.5 K at the composite containing 1.0 wt% additive. 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