Two Anderson impurities in a two-dimensional host with Rashba spin-orbit interaction

We study the two-dimensional two-impurity Anderson model with additional Rashba spin-orbit interaction by means of the modified perturbation theory. The impurity Green's functions we construct exactly reproduce the first four spectral moments. We discuss the height and the width of the even or odd Kondo peaks as functions of the interimpurity distance and the Rashba energy E-R (the strength of the Rashba spin-orbit interaction). For small impurity separations the Kondo temperature shows a nonmonotonic dependence on E-R, being different in the even and the odd channels. We predict that the Kondo temperature has only an almost-linear dependence on E-R and not an exponential increase with E-R.