THE SINGLE IMPURITY PROBLEM WITH INTERACTIONS IN 2 DIMENSIONS

We study the behaviour of a single impurity potential V-imp within a c ombined method of renormalization group and bosonization in two dimens ions. For repulsive interactions the 2K(F) backscattering components o f 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-int eracting case. At finite temperatures, we obtain results controlled by the interactions. Here we identify a range of temperatures in which t he conductivity increases with the lowering of the temperature.