Surface Modification of Quantum Materials

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dc.contributor.advisorYi, Ming
dc.contributor.advisorKono, Junichiro
dc.creatorYue, Ziqin
dc.date.accessioned2024-01-22T22:13:12Z
dc.date.available2024-01-22T22:13:12Z
dc.date.created2023-08
dc.date.issued2023-09-15
dc.date.submittedAugust 2023
dc.date.updated2024-01-22T22:13:12Z
dc.descriptionEMBARGO NOTE: This item is embargoed until 2024-08-01
dc.description.abstractThe tuning of surface electronic structure in quantum materials has emerged as an important research direction with broad implications for both fundamental physics as well as applications. Here we carried out angle-resolved photoemission spectroscopy to characterize the continuous evolution of the electronic band structures in a prototypical three-dimensional topological insulator, Bi2Se3, and a van der Waals ferromagnetic semiconductor, Cr2Ge2Te6, using different approaches of in-situ surface modification. In Bi2Se3, by active hydrogen etching, we demonstrate the gradual removal of Se atoms and the formation of Bi bilayers that directly result in the spatial tuning of the topological surface states. In Cr2Ge2Te6, by surface alkali metal dosing, we observe the appearance and tuning of a Van Hove singularity in the electronic structure and subsequent renormalization of the conduction band, suggesting the tuning of surface charge carriers as a way to modify electronic correlations in 2D materials.
dc.embargo.lift2024-08-01
dc.embargo.terms2024-08-01
dc.format.mimetypeapplication/pdf
dc.identifier.citationYue, Ziqin. "Surface Modification of Quantum Materials." (2023) Master's thesis, Rice University. https://hdl.handle.net/1911/115348
dc.identifier.urihttps://hdl.handle.net/1911/115348
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectSurface Modification
dc.subjectTopological Materials
dc.subjectvan der Waals Materials
dc.titleSurface Modification of Quantum Materials
dc.typeThesis
dc.type.materialText
thesis.degree.departmentApplied Physics
thesis.degree.disciplineApplied Physics/Physics
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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