Journal ArticleDOI
Hydrogen atoms cause long-range electronic effects on graphite
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TLDR
The range of modifications in the electronic structure, of fundamental importance for electronic devices based on carbon nanostructures, has been found to be of the order of 20-25 lattice constants.Abstract:
We report on long-range electronic effects caused by hydrogen-carbon interaction at the graphite surface. Two types of defects could be distinguished with a combined mode of scanning tunneling microscopy and atomic force microscopy: chemisorption of hydrogen on the basal plane of graphite and atomic vacancy formation. Both types show a $(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}$ superlattice in the local density of states but have a different topographic structure. The range of modifications in the electronic structure, of fundamental importance for electronic devices based on carbon nanostructures, has been found to be of the order of 20--25 lattice constants.read more
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Emergence of magnetism in graphene materials and nanostructures
Oleg V. Yazyev,Oleg V. Yazyev +1 more
TL;DR: In this paper, a review of magnetic properties of spintronic devices based on carbon nanofragments and graphite is presented, with the help of computational examples based on simple model Hamiltonians.
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Properties of graphene: a theoretical perspective
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Scattering and interference in epitaxial graphene.
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TL;DR: It is shown that, when its source is atomic-scale lattice defects, wave functions of different symmetries can mix and reflect both intravalley and intervalley scattering.
Journal ArticleDOI
Observation of zigzag and armchair edges of graphite using scanning tunneling microscopy and spectroscopy
TL;DR: In this paper, the presence of structure-dependent edge states of graphite is revealed by both ambient and ultra-high-vacuum (UHV) scanning tunneling microscopy and scan tunneling spectroscopy observations.
Journal ArticleDOI
Atomic-scale control of graphene magnetism by using hydrogen atoms
Héctor González-Herrero,José M. Gómez-Rodríguez,Pierre Mallet,Pierre Mallet,Mohamed Moaied,Mohamed Moaied,Juan Jose Palacios,Carlos Salgado,Miguel M. Ugeda,Jean-Yves Veuillen,Jean-Yves Veuillen,Felix Yndurain,Ivan Brihuega +12 more
TL;DR: Scanning tunneling microscopy experiments show that such a spin-polarized state is essentially localized on the carbon sublattice opposite to the one where the hydrogen atom is chemisorbed, drives the direct coupling between the magnetic moments at unusually long distances.