Low-field negative magnetoresistance in double-layer structures

The weak-localization correction to the conductivity in coupled double-laye r structures is studied both experimentally and theoretically. Statistics o f closed paths have been obtained from the analysis of the magnetic field a nd temperature dependencies of negative magnetoresistance for the magnetic field perpendicular and parallel to the structure plane. The comparison of experimental data with the results of a computer simulation of carrier moti on over two two-dimensional layers with scattering shows that interlayer tr ansitions play a decisive role in the weak localization.