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Issue 11, 2017
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Atomically-resolved edge states on surface-nanotemplated graphene explored at room temperature

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Abstract

Graphene edges present localized electronic states strongly depending on their shape, size and border configuration. Chiral- or zigzag-ended graphene nanostructures develop spatially and spectrally localized edge states around the Fermi level; however, atomic scale investigations of such graphene terminations and their related electronic states are very challenging and many of their properties remain unexplored. Here we present a combined experimental and theoretical study on graphene stripes showing strong metallic edge states at room temperature. By means of scanning tunneling microscopy, we demonstrate the use of vicinal Pt(111) as a template for the growth of graphene stripes and characterize their electronic structure. We find the formation of a sublattice localized electronic state confined on the free-standing edges of the graphene ribbons at energies close to the Fermi level. These experimental results are reproduced and understood with tight-binding and ab initio calculations. Our results provide a new way of synthesizing wide graphene stripes with zigzag edge termination and open new prospects in the study of valley and spin phenomena at their interfaces.

Graphical abstract: Atomically-resolved edge states on surface-nanotemplated graphene explored at room temperature

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Publication details

The article was received on 16 Jan 2017, accepted on 09 Feb 2017 and first published on 14 Feb 2017


Article type: Paper
DOI: 10.1039/C7NR00367F
Citation: Nanoscale, 2017,9, 3905-3911
  • Open access: Creative Commons BY license
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    Atomically-resolved edge states on surface-nanotemplated graphene explored at room temperature

    P. Merino, H. Santos, A. L. Pinardi, L. Chico and J. A. Martin-Gago, Nanoscale, 2017, 9, 3905
    DOI: 10.1039/C7NR00367F

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