Condensed Matter Physics, 2017, vol. 20, No. 4, 43705
Title:
On the density of states of graphene in the nearestneighbor approximation
Author(s):

V.O. Ananyev
(Faculty of Physics, Taras Shevchenko National Kyiv University, 6 Academician Glushkov Ave., Kyiv 03680, Ukraine)
,


M.I. Ovchynnikov
(Faculty of Physics, Taras Shevchenko National Kyiv University, 6 Academician Glushkov Ave., Kyiv 03680, Ukraine)

We propose an alternative analytical expression for the density of states of a clean graphene in the nearestneighbor approximation. In contrast to the previously known expression it can
be written as a single formula valid for the whole energy range. The correspondence with the previously known expression is shown and the limiting cases are analyzed.
Key words:
graphene, density of states, van Hove singularity
PACS:
71.20.Tx, 73.22.Pr
