Orthogonality catastrophe and Kondo effect in graphene

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Anderson's orthogonality catastrophe in graphene, at energies close to the Dirac point, is analyzed. It is shown that, in clean systems, the orthogonality catastrophe is suppressed, due to the vanishing density of states at the Dirac point. In the presence of preexisting localized states at the Dirac energy, the orthogonality catastrophe shows similar features to those found in normal metals with a finite density of states at the Fermi level. The implications for the Kondo effect induced by magnetic impurities, and for the Fermi edge singularities in tunneling processes are also discussed.
7 pages, 7 figures

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/154115

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0705.0522
 http://arxiv.org/abs/0705.0522
 Phys. Rev. B 76, 115407 (2007)
 doi:10.1103/PhysRevB.76.115407

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arXiv