Origin of the energy bandgap in epitaxial graphene

Details Origin of the energy bandgap in epitaxial graphene Origin of the energy bandgap in epitaxial graphene

2008-04-10

arxiv.org/abs/0804.1818v1

Nature Mat. 7, 259-260 (2008)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1038/nmat2154b

We studied the effect of quantum confinement on the size of the band gap in single layer epitaxial graphene. Samples with different graphene terrace sizes are studied by using low energy electron microscopy (LEEM) and angle-resolved photoemission spectroscopy (ARPES). The direct correlation between the terrace size extracted from LEEM and the gap size extracted from ARPES shows that quantum confinement alone cannot account for the large gap observed in epitaxial graphene samples.

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