The single impurity problem with interactions in two dimensions

We study the behaviour of a single impurity potential V-imp within a combined method of renormalization group and bosonization in two dimensions. For repulsive interactions the 2K(F) backscattering components of the impurity potential are enhanced with respect to the other angles. We estimate the corrections to the conductivity as a function of E-F/T. For E-F/T --> infinity we obtain similar results as in the non-interacting case. At finite temperatures, we obtain results controlled by the interactions. Here we identify a range of temperatures in which the conductivity increases with the lowering of the temperature.