Abstract
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.
- Received 18 June 2018
- Revised 5 September 2018
DOI:https://doi.org/10.1103/PhysRevB.98.195430
©2018 American Physical Society
Physics Subject Headings (PhySH)
Condensed Matter, Materials & Applied PhysicsInterdisciplinary Physics
