IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Optical conductivity and transparency in an effective model for graphene
Autor/es:
LOEWE, MARCELO; FALOMIR, HORACIO; RAYA, ALFREDO; MUÑOZ, ENRIQUE
Revista:
Physical Review B
Editorial:
American Physical Society
Referencias:
Año: 2018 vol. 98
ISSN:
2469-9950
Resumen:
Motivated by experiments confirming that the optical transparency of graphene is defined through the fine structure constant and that it could be fully explained within the relativistic Dirac fermions in a two-dimensional picture, we investigate in this article how this property is affected by next-to-nearest-neighbor coupling in the low-energy continuum description of graphene. A detailed calculation within the linear response regime allows us to conclude that, somewhat surprisingly, the optical conductivity at zero temperature that determines the transparency remains robust up to this correction.