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Graphene Devices for Sensing and Electrical Control of Magnetic Phenomena

dc.contributor.authorSchaefer, Brian
dc.contributor.chairNowack, Katja C.
dc.contributor.committeeMemberMcEuen, Paul L.
dc.contributor.committeeMemberMueller, Erich
dc.date.accessioned2021-09-09T17:41:02Z
dc.date.available2021-09-09T17:41:02Z
dc.date.issued2021-05
dc.description175 pages
dc.description.abstractGraphene is a material consisting of a single layer of carbon atoms, with distinctive electronic characteristics that make it an interesting platform for a variety of applications. In this dissertation, I discuss projects applying graphene towards experiments involving scanning magnetometry, a technique to image stray magnetic fields above the surface of a material or device. First, I provide an overview of scanning magnetometry techniques and detailed fabrication procedures for high-quality graphene devices. Then, I evaluate ultraclean graphene as a material for highly sensitive Hall-effect sensors. These devices are promising for the development of a scanning Hall probe microscope operational over a range of temperatures and magnetic fields not previously accessible with a single sensor. I then discuss calculations predicting an orbital magnetoelectric effect in strained bilayer graphene. This effect is electrically tunable, switchable, and arises from orbital degrees of freedom. Finally, I present progress towards experimentally realizing strained bilayer graphene devices and propose studying the effect using scanning magnetometry.
dc.identifier.doihttps://doi.org/10.7298/kkae-rm46
dc.identifier.otherSchaefer_cornellgrad_0058F_12429
dc.identifier.otherhttp://dissertations.umi.com/cornellgrad:12429
dc.identifier.urihttps://hdl.handle.net/1813/109798
dc.language.isoen
dc.subjectgraphene
dc.subjectHall sensors
dc.subjectmagnetometry
dc.subjectorbital magnetism
dc.subjectscanning probe microscopy
dc.titleGraphene Devices for Sensing and Electrical Control of Magnetic Phenomena
dc.typedissertation or thesis
dcterms.licensehttps://hdl.handle.net/1813/59810
thesis.degree.disciplinePhysics
thesis.degree.grantorCornell University
thesis.degree.levelDoctor of Philosophy
thesis.degree.namePh. D., Physics

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