Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/3570
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dc.contributor.advisorSenger, Ramazan Tuğrul-
dc.contributor.authorİyikanat, Fadıl-
dc.date.accessioned2014-07-22T13:51:50Z-
dc.date.available2014-07-22T13:51:50Z-
dc.date.issued2013en
dc.identifier.urihttp://hdl.handle.net/11147/3570-
dc.descriptionThesis (Master)--Izmir Institute of Technology, Physics, Izmir, 2013en
dc.descriptionIncludes bibliographical references (leaves: 65-71)en
dc.descriptionText in English; Abstract: Turkish and Englishen
dc.descriptionxii, 71 leavesen
dc.description.abstractThe triangular graphene flakes (N-TGFs) we consider have equilateral triangular shapes with zigzag edges, where N denotes the number of edge hexagonal cells in one side of the triangle. Termination of these N-TGF structures with several elements (of the first two rows of the periodic table) and application of electric field to these flakes alter their electronic and magnetic properties. In accordance with previous studies [1, 2], it is found that bare flakes have large spin magnetic moment values of 4(N − 1) μB, whereas they reduce to (N − 1) μB for full saturation of edges with Hydrogen, Lithium, Beryllium or Flour atoms. Moreover we have studied possible termination of TGF with other elements like Boron, Carbon and Nitrogen. Hydrogen and Flour atoms prefer to bind at the top of an edge Carbon atom. Unlike Hydrogen and Flour, the other atoms prefer to bind at the bridge sites. Recent studies [3, 4] have shown that themagneticmoments of triangular graphene flakes can be controlled by applied electric field. We show that the value of total spin polarization of triangular graphene flakes can be changed by tuning an applied in-plane external field. We demonstrate that, in these flakes total spin polarization can be reduced stepwise with the applied field. The electric field control of ferromagnetism in TGFs promises a new route for spintronic applications.en
dc.language.isoenen_US
dc.publisherIzmir Institute of Technologyen
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject.lcshGrapheneen
dc.subject.lcshElectric fieldsen
dc.subject.lcshSpintronicsen
dc.titleCalculations of electric and magnetic properties of triangular graphene fragments using density functional theory: Effects of edge functionalization and electric fielden_US
dc.typeMaster Thesisen_US
dc.institutionauthorİyikanat, Fadıl-
dc.departmentThesis (Master)--İzmir Institute of Technology, Physicsen_US
dc.relation.publicationcategoryTezen_US
item.openairetypeMaster Thesis-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
Appears in Collections:Master Degree / Yüksek Lisans Tezleri
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