Origin of the energy bandgap in epitaxial graphene

Abstract

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.

References in corpus (2)

• Substrate-induced band gap opening in epitaxial graphene
• Departure from the conical dispersion in epitaxial graphene

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