Large enhancement of the electron–electron interaction constant in magnetic layered structures

Abstract

Some peculiarities of the logarithmic electron–electron interaction corrections to conductivity of magnetic quantum wells are discussed theoretically. The peculiarities are a consequence of the fact that the matrix elements of Coulomb interaction include different screening contributions from spin-up and spin-down electrons. It is shown that this can lead to large peaks in the interaction constant, when width of a spin quantum well is changed.