Katsnelson, M. I. - In: The European Physical Journal B - Condensed Matter and … 51 (2006) 2, pp. 157-160
It has been recently demonstrated experimentally that graphene, or single-layer carbon, is a gapless semiconductor with massless Dirac energy spectrum. A finite conductivity per channel of order of e<Superscript>2</Superscript>/h in the limit of zero temperature and zero charge carrier density is one of the striking...</superscript>