Superconductivity and magnetic ordering in chalcogen-intercalated graphene bilayers with charge compensation

Superconductivity and magnetic ordering in chalcogen-intercalated graphene bilayers with charge compensation | 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 Superconductivity and magnetic ordering in chalcogen-intercalated graphene bilayers with charge compensation Tommy Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6109671/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 This work introduces a new class of two-dimensional crystals with the structure AC 8 XC 8 , consisting of two layers of graphene, a chalcogen (X = O, S, Se, Te) intercalation layer, and an alkaline earth (A = Be, Ca, Mg, Sr, Ba) adlayer. The electronic band structure for the 20 compounds was studied using density functional theory. The chalcogen p orbitals interact with the carbon π orbitals to form weakly dispersing bands that give rise to complex Fermi surfaces featuring electron and hole pockets whose densities exactly compensate each other, and van Hove singularities that are very close to, or coincident with, the Fermi level in the majority of compounds studied. The resulting electron-electron interaction effects are studied using both the temperature-flow renormalisation group approach and a spin fluctuation model, which show a dominant ferromagnetic instability coexisting with p - or f -wave spin triplet superconductivity over a range of temperatures. Physical sciences/Nanoscience and technology/Nanoscale materials/Two-dimensional materials Physical sciences/Physics/Condensed-matter physics/Superconducting properties and materials Full Text Additional Declarations There is NO Competing Interest. Supplementary Files supplement.pdf 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-6109671","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":430092965,"identity":"d67eb227-6376-44f0-b4b8-7ce7583a51f9","order_by":0,"name":"Tommy Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA4ElEQVRIiWNgGAWjYNCCAgkGAwYGxgdAJg8fIcU8YNIArIXZACTARqQWMGKTALEJarFn707dzGNgkWcukf6s8muOnQwbA/PDRzfw2cJzdtttHgOJYssZOWa3ZbclAx3GZmycg0+LRC5YS+KGGzlstyW3MQO18LBJE6kl/Vmx5LZ6krQkmDF+3HaYCC1nzm67OQfoF4Mzb4ylGbcd52FjJuAX9vbebTfeVNTlGRxPf/jx57Zqe3725oeP8WkBASZg5CQwCCQwMINjiZmAchBg/AHSwn8AzBgFo2AUjIJRgAEAQ4dF21YwFjcAAAAASUVORK5CYII=","orcid":"","institution":"The University of Technology, Sydney","correspondingAuthor":true,"prefix":"","firstName":"Tommy","middleName":"","lastName":"Li","suffix":""}],"badges":[],"createdAt":"2025-02-26 04:26:03","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6109671/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6109671/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":84043482,"identity":"1f2255a9-51ae-43c3-8dbd-821d3e041c40","added_by":"auto","created_at":"2025-06-06 06:43:51","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":4544969,"visible":true,"origin":"","legend":"","description":"","filename":"main.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6109671/v1_covered_3199746f-4821-4d64-b7ba-a1f224df4322.pdf"},{"id":84042791,"identity":"9a6e29fd-b4bf-4bc1-a1f8-a473a022d22b","added_by":"auto","created_at":"2025-06-06 06:35:46","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":25607126,"visible":true,"origin":"","legend":"\u003cp\u003e\u003cbr\u003e\u003c/p\u003e","description":"","filename":"supplement.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6109671/v1/f250ef8f1c917a9837776b7f.pdf"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"Superconductivity and magnetic ordering in chalcogen-intercalated graphene bilayers with charge compensation","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":"nature-portfolio","isNatureJournal":true,"hasQc":false,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"","title":"Nature Portfolio","twitterHandle":"","acdcEnabled":false,"dfaEnabled":false,"editorialSystem":"ejp","reportingPortfolio":"","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-6109671/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6109671/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis work introduces a new class of two-dimensional crystals with the structure AC\u003csub\u003e8\u003c/sub\u003eXC\u003csub\u003e8\u003c/sub\u003e, consisting of two layers of graphene, a chalcogen (X = O, S, Se, Te) intercalation layer, and an alkaline earth (A = Be, Ca, Mg, Sr, Ba) adlayer. The electronic band structure for the 20 compounds was studied using density functional theory. The chalcogen \u003cem\u003ep\u003c/em\u003e orbitals interact with the carbon \u003cem\u003eπ\u003c/em\u003e orbitals to form weakly dispersing bands that give rise to complex Fermi surfaces featuring electron and hole pockets whose densities exactly compensate each other, and van Hove singularities that are very close to, or coincident with, the Fermi level in the majority of compounds studied. The resulting electron-electron interaction effects are studied using both the temperature-flow renormalisation group approach and a spin fluctuation model, which show a dominant ferromagnetic instability coexisting with \u003cem\u003ep\u003c/em\u003e- or \u003cem\u003ef\u003c/em\u003e-wave spin triplet superconductivity over a range of temperatures.\u003c/p\u003e","manuscriptTitle":"Superconductivity and magnetic ordering in chalcogen-intercalated graphene bilayers with charge compensation","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-06-06 06:35:41","doi":"10.21203/rs.3.rs-6109671/v1","editorialEvents":[],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"communications-materials","isNatureJournal":true,"hasQc":false,"allowDirectSubmit":false,"externalIdentity":"commsmat","sideBox":"Learn more about [Communications Materials](https://www.nature.com/commsmat/)","snPcode":"","submissionUrl":"","title":"Communications Materials","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"ejp","reportingPortfolio":"Communications Series","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"cc6e0a9e-c0bf-4daa-83a2-fa140f688594","owner":[],"postedDate":"June 6th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[{"id":45808100,"name":"Physical sciences/Nanoscience and technology/Nanoscale materials/Two-dimensional materials"},{"id":45808101,"name":"Physical sciences/Physics/Condensed-matter physics/Superconducting properties and materials"}],"tags":[],"updatedAt":"2025-06-06T06:35:41+00:00","versionOfRecord":[],"versionCreatedAt":"2025-06-06 06:35:41","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6109671","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6109671","identity":"rs-6109671","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}