Título:
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Tight-binding approach to penta-graphene
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Autores:
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Stauber, T. ;
Beltrán Finez, Juan Ignacio ;
Schliemann, J.
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Tipo de documento:
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texto impreso
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Editorial:
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Nature Publishing Group, 2016-03-04
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electricidad
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Materia = Ciencias: Física: Electrónica
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Tipo = Artículo
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Resumen:
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We introduce an effective tight-binding model to discuss penta-graphene and present an analytical solution. This model only involves the ?-orbitals of the sp2-hybridized carbon atoms and reproduces the two highest valence bands. By introducing energy-dependent hopping elements, originating from the elimination of the sp3-hybridized carbon atoms, also the two lowest conduction bands can be well approximated - but only after the inclusion of a Hubbard onsite interaction as well as of assisted hopping terms. The eigenfunctions can be approximated analytically for the effective model without energy-dependent hopping elements and the optical absorption is discussed. We find large isotropic absorption ranging from 7.5% up to 24% for transitions at the ?-point.
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En línea:
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https://eprints.ucm.es/37163/1/Beltr%C3%A1nF%C3%ADnez%2001%20LIBRE%2BCC.pdf
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