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dc.contributor.advisorSinova, Jairo
dc.contributor.advisorAbanov, Artem G
dc.creatorHemmatiyan, Shayan
dc.date.accessioned2017-03-02T16:48:33Z
dc.date.available2017-03-02T16:48:33Z
dc.date.created2016-12
dc.date.issued2016-12-02
dc.date.submittedDecember 2016
dc.identifier.urihttp://hdl.handle.net/1969.1/159036
dc.description.abstractIn this thesis, I propose a practical way to stabilize half passivated graphene (graphone). I show that the dipole moments induced by a hexagonal-boron nitride (h-BN) substrate on graphene stabilize the hydrogen atoms on one sublattice of the graphene layer and suppress the migration of the adsorbed hydrogen atoms. I also present the substrate effect of h-BN that reduces distortion induced by fluorination of graphene and stabilizes half-passivated graphene in a single sublattice. Then using spin-polarized density functional calculations I investigate magnetic properties of graphone. I show the system has different magnetic order which can be described by either super-exchange or double exchange mechanisms depending on the type of add atom. The hybridization of graphene changes from sp^2- to sp^3- type hybridization due to the buckling induced by passivation. The change in hybridization together with add-atom orbitals induces a fairly large spin orbit coupling (SOC). Based upon first principle spin-polarized density of states calculations, I show that the graphone obtained in different graphene/h-BN heterostructures exhibits a half metallic state. I propose to use this exotic material for spin valve systems and other spintronics devices.en
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subjectgrapheneen
dc.subjectgraphoneen
dc.subjectspintronicsen
dc.subjecthalf-passivated grapheneen
dc.subjecttunneling magnetoresistanceen
dc.titleSpintronics in Half-Passivated Grapheneen
dc.typeThesisen
thesis.degree.departmentPhysics and Astronomyen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorTexas A & M Universityen
thesis.degree.nameDoctor of Philosophyen
thesis.degree.levelDoctoralen
dc.contributor.committeeMemberNaugle, Donald
dc.contributor.committeeMemberCagin, Tahir
dc.type.materialtexten
dc.date.updated2017-03-02T16:48:33Z
local.etdauthor.orcid0000-0001-8761-4635


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