Low-field negative magnetoresistance in double-layer structures

The weak-localization correction to the conductivity in coupled double-layer structures is studied both experimentally and theoretically. Statistics of closed paths have been obtained from the analysis of the magnetic field and 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 motion over two two-dimensional layers with scattering shows that interlayer transitions play a decisive role in the weak localization.