Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3028015
Keywords
band structure; carbon; doping; electron microscopy; monolayers; nanostructured materials; photoelectron spectra; quasiparticles; surface morphology
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Funding
- U. S. Department of Energy [DE-AC02-05CH11231]
- National Science Foundation [DMR03-49361]
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Self-doping in graphene has been studied by examining single-layer epitaxially grown graphene samples with differing characteristic lateral terrace widths. Low energy electron microscopy was used to gain real-space information about the graphene surface morphology, which was compared with data obtained by angle-resolved photoemission spectroscopy to study the effect of the monolayer graphene terrace width on the low energy dispersions. By altering the graphene terrace width, we report significant changes in the electronic structure and quasiparticle relaxation time of the material, in addition to a terrace width-dependent doping effect.
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