Phys. Rev. Lett. 105, 036804 (2010) [4 pages]Potential Energy Landscape for Hot Electrons in Periodically Nanostructured GrapheneReceived 15 April 2010; published 16 July 2010 We explore the spatial variations of the unoccupied electronic states of graphene epitaxially grown on Ru(0001) and observed three unexpected features: the first graphene image state is split in energy; unlike all other image states, the split state does not follow the local work function modulation, and a new interfacial state at +3 eV appears on some areas of the surface. First-principles calculations explain the observations and permit us to conclude that the system behaves as a self-organized periodic array of quantum dots. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.105.036804
DOI:
10.1103/PhysRevLett.105.036804
PACS:
73.20.-r, 68.37.Ef, 68.55.-a, 73.22.Pr
See AlsoComment: H. G. Zhang and T. Greber, Comment on “Potential Energy Landscape for Hot Electrons in Periodically Nanostructured Graphene”, Phys. Rev. Lett. 105, 219701 (2010). |
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