Symmetry Selective Resonances in Fe-MgO-ZnO-MgO-Fe

Symmetry Selective Resonances in Fe-MgO-ZnO-MgO-Fe | 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 Symmetry Selective Resonances in Fe-MgO-ZnO-MgO-Fe Sabarna Chakraborti, Arti Kashyap, Abhishek Sharma This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7291314/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract We propose the physics of symmetry-selective resonance of the ∆1 states in the Fe/MgO/ZnO/MgO/Fe heterostructures, that offers a broad landscape to design magnetic tun- nel junctions (MTJs). These MTJs yield a towering tunnel magnetoresistance (TMR) upto 3.5×10 4 % with the resistance area (RA) product dipping down till a minimum of 0.05Ω-µm 2 , while maintaining a nearly perfect (99%) spin polarization. Our predictions are based on the self-consistent coupling of the non-equilibrium Green’s function(NEGF) with the density func- tional theory(DFT). We also present the charge current, spin current and TMR of a prototype(p) Fe/MgO(3-layer(l))/ZnO(3l)/MgO(3l)/Fe-MTJ(abbreviated as p-∆ R 1 -MTJ), which provides a pro- nounced advancement in the TMR(1.3×10 4 %), RA product(0.45Ω-µm 2 ) and spin polarization(99%) over its Fe/MgO(6l)/Fe-based counterpart(TMR ≈ 3.4 × 10 3 %, RA product≈ 23Ω-µm 2 ). A marked improvement in RA product with 99% spin polarization while maintaining 4 times higher TMR in p- ∆ R 1 -MTJ over the regular(r)-MTJ is a strong indicator of a momentous improvement in spin-transfer torque(STT). Using the non-equilibrium finite bias characteristics, we estimate 54-fold improvement in STT-switching energy of the p-∆ R 1 -MTJ over r-MTJ. We substantiate our findings by combin- ing the transmission eigenchannel analysis, spectral density, and Fe-contact band structure in the p-∆ R 1 -MTJ, thereby elucidating the physics of symmetry-selective resonances. Physical sciences/Materials science Physical sciences/Nanoscience and technology Physical sciences/Physics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 13 Oct, 2025 Reviews received at journal 09 Oct, 2025 Reviews received at journal 22 Sep, 2025 Reviewers agreed at journal 29 Aug, 2025 Reviewers agreed at journal 29 Aug, 2025 Reviewers invited by journal 22 Aug, 2025 Editor assigned by journal 18 Aug, 2025 Submission checks completed at journal 18 Aug, 2025 First submitted to journal 04 Aug, 2025 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. 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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-7291314","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":507436722,"identity":"9660288e-ade0-487a-8c09-15c1d0a6f496","order_by":0,"name":"Sabarna Chakraborti","email":"","orcid":"","institution":"Indian Institute of Technology Ropar","correspondingAuthor":false,"prefix":"","firstName":"Sabarna","middleName":"","lastName":"Chakraborti","suffix":""},{"id":507436723,"identity":"b8f30dd3-5ea3-40e4-92f5-8561263e6505","order_by":1,"name":"Arti Kashyap","email":"","orcid":"","institution":"Indian Institute of Technology Mandi","correspondingAuthor":false,"prefix":"","firstName":"Arti","middleName":"","lastName":"Kashyap","suffix":""},{"id":507436724,"identity":"0566387b-32a5-4257-9883-8c37306a5ff8","order_by":2,"name":"Abhishek Sharma","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAyklEQVRIiWNgGAWjYDACCR6GAx8MJCDsBBDJTISWgzMMJCRI08LMA6TAbKLcxT+79+BhmwKLOt32swdvPGCwk2dg5z2A35I75xIO5wAdZnYmL9kigSHZsIGZLwG/NTdyDCBaDuSYAf3CDEQ8Bnh1yIO0WIC0nH8D0lJPWIsBSAsDSMsNsC2HCWsxvHPG4GCPgYTkthtvjC0SDI4bthHSIne7x/jDjz91/Gbncwxv/qiolufnP4NfC7o7GRjYSFE/CkbBKBgFowA7AABCfjzUKaG5dwAAAABJRU5ErkJggg==","orcid":"","institution":"Indian Institute of Technology Mandi","correspondingAuthor":true,"prefix":"","firstName":"Abhishek","middleName":"","lastName":"Sharma","suffix":""}],"badges":[],"createdAt":"2025-08-04 12:53:08","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7291314/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7291314/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":90285448,"identity":"5758e2ca-fc15-448c-abed-da04de182dd4","added_by":"auto","created_at":"2025-09-01 06:05:20","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":6292703,"visible":true,"origin":"","legend":"","description":"","filename":"Delta1MTJDFTNEGF.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7291314/v1_covered_232f2fc3-5937-4324-a3c7-7c6851ec27fc.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Symmetry Selective Resonances in Fe-MgO-ZnO-MgO-Fe","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"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":"npj-spintronics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [npj Spintronics](https://www.nature.com/npjspintronics/)","snPcode":"44306","submissionUrl":"https://submission.springernature.com/new-submission/44306/3","title":"npj Spintronics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"NPJ","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-7291314/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7291314/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWe propose the physics of symmetry-selective resonance of the ∆1 states in the Fe/MgO/ZnO/MgO/Fe heterostructures, that offers a broad landscape to design magnetic tun- nel junctions (MTJs). These MTJs yield a towering tunnel magnetoresistance (TMR) upto 3.5×10\u003csup\u003e4\u003c/sup\u003e% with the resistance area (RA) product dipping down till a minimum of 0.05Ω-µm\u003csup\u003e2\u003c/sup\u003e , while maintaining a nearly perfect (99%) spin polarization. Our predictions are based on the self-consistent coupling of the non-equilibrium Green’s function(NEGF) with the density func- tional theory(DFT). We also present the charge current, spin current and TMR of a prototype(p) Fe/MgO(3-layer(l))/ZnO(3l)/MgO(3l)/Fe-MTJ(abbreviated as p-∆\u003csup\u003eR\u003c/sup\u003e\u003csub\u003e1\u003c/sub\u003e -MTJ), which provides a pro- nounced advancement in the TMR(1.3×10\u003csup\u003e4\u003c/sup\u003e%), RA product(0.45Ω-µm\u003csup\u003e2\u003c/sup\u003e ) and spin polarization(99%) over its Fe/MgO(6l)/Fe-based counterpart(TMR ≈ 3.4 × 10\u003csup\u003e\u003csub\u003e3\u003c/sub\u003e\u003c/sup\u003e%, RA product≈ 23Ω-µm\u003csup\u003e2\u003c/sup\u003e ). A marked improvement in RA product with 99% spin polarization while maintaining 4 times higher TMR in p- ∆\u003csup\u003eR\u003c/sup\u003e\u003csub\u003e1\u003c/sub\u003e -MTJ over the regular(r)-MTJ is a strong indicator of a momentous improvement in spin-transfer torque(STT). Using the non-equilibrium finite bias characteristics, we estimate 54-fold improvement in STT-switching energy of the p-∆\u003csup\u003eR\u003c/sup\u003e\u003csub\u003e1\u003c/sub\u003e -MTJ over r-MTJ. We substantiate our findings by combin- ing the transmission eigenchannel analysis, spectral density, and Fe-contact band structure in the p-∆\u003csup\u003eR\u003c/sup\u003e\u003csub\u003e1\u003c/sub\u003e -MTJ, thereby elucidating the physics of symmetry-selective resonances.\u003c/p\u003e","manuscriptTitle":"Symmetry Selective Resonances in Fe-MgO-ZnO-MgO-Fe","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-09-01 05:56:52","doi":"10.21203/rs.3.rs-7291314/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2025-10-13T14:47:56+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-10-09T16:21:00+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2025-09-22T13:53:24+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"101751317341863915908864548671577635588","date":"2025-08-29T11:50:27+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"167742270992214410036275079810753191991","date":"2025-08-29T10:21:35+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-08-22T09:42:00+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-08-18T11:42:31+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2025-08-18T06:46:55+00:00","index":"","fulltext":""},{"type":"submitted","content":"npj Spintronics","date":"2025-08-04T12:37:20+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"npj-spintronics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [npj Spintronics](https://www.nature.com/npjspintronics/)","snPcode":"44306","submissionUrl":"https://submission.springernature.com/new-submission/44306/3","title":"npj Spintronics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"NPJ","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"f842ad84-0f93-4f93-bf27-b8f63c977755","owner":[],"postedDate":"September 1st, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[{"id":53901743,"name":"Physical sciences/Materials science"},{"id":53901744,"name":"Physical sciences/Nanoscience and technology"},{"id":53901745,"name":"Physical sciences/Physics"}],"tags":[],"updatedAt":"2026-04-01T08:38:12+00:00","versionOfRecord":[],"versionCreatedAt":"2025-09-01 05:56:52","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7291314","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7291314","identity":"rs-7291314","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}