RKKY indirect exchange in low-dimensional superconductors

Abstract

The indirect exchange interaction between localized moments (LMs), mediated by one- and two-dimensional superconducting electron gas, is calculated by means of thermodynamic Green functions. The interaction potential is expressed in terms of higher transcendental functions of distance R between LMs. The asymptotic behavior at large R is presented for 1D and 2D cases. It is shown that an additional long range potential appears in the superconducting state as compared with the normal one. © 1993.