Some basic assumptions made by the present author in his work about c-axis transport in layered cuprates are examined on simple models. First, a one-dimensional model is considered with a localized center slightly displaced from the middle of the barrier in order to find out whether this displacement prevents resonant tunneling. Second, a three-dimensional model is analyzed with two resonant centers in the median plane; the goal is to establish whether tunneling through such centers can be coherent. The results provide support for the basic assumptions.
© 1997 The American Physical Society