dc.contributor.advisor | Sinova, Jairo | |
dc.contributor.advisor | Abanov, Artem G | |
dc.creator | Hemmatiyan, Shayan | |
dc.date.accessioned | 2017-03-02T16:48:33Z | |
dc.date.available | 2017-03-02T16:48:33Z | |
dc.date.created | 2016-12 | |
dc.date.issued | 2016-12-02 | |
dc.date.submitted | December 2016 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/159036 | |
dc.description.abstract | In 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.mimetype | application/pdf | |
dc.language.iso | en | |
dc.subject | graphene | en |
dc.subject | graphone | en |
dc.subject | spintronics | en |
dc.subject | half-passivated graphene | en |
dc.subject | tunneling magnetoresistance | en |
dc.title | Spintronics in Half-Passivated Graphene | en |
dc.type | Thesis | en |
thesis.degree.department | Physics and Astronomy | en |
thesis.degree.discipline | Physics | en |
thesis.degree.grantor | Texas A & M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.level | Doctoral | en |
dc.contributor.committeeMember | Naugle, Donald | |
dc.contributor.committeeMember | Cagin, Tahir | |
dc.type.material | text | en |
dc.date.updated | 2017-03-02T16:48:33Z | |
local.etdauthor.orcid | 0000-0001-8761-4635 | |