Field theoretic description of graphene in an electromagnetic background at finite temperature and density

E.M. SANTANGELO

Trieste, Italia

Conferencia; GRAPHENE WEEK 08; 2008

International Center of Theoretical Physics (ICTP)

We present the evaluation of the effective action, at finite temperature and density, for Dirac fields in the presence of an electromagnetic background, in three Euclidean dimensions. Apart from explaining (in the low temperature limit) the behavior of the Hall conductivity for graphene, our results show the existence of a direct relationship between the selection of a phase for the Dirac determinant and the generation (or lack thereof) of Berry´s phases and Chern-Simons terms.