Weak localization of Dirac fermions in graphene beyond the diffusion   regime
  We develop a microscopic theory of the weak localization of two-dimensional massless Dirac fermions which is valid in the whole range of classically weak magnetic fields. The theory is applied to calculate magnetoresistance caused by the weak localization in graphene and conducting surfaces of bulk topological insulators. 
M.O. Nestoklon, N.S. Averkiev, and S.A.Tarasenko
cond-mat.mes-hall