Triangular double barrier resonant tunneling

Double barrier structures with a triangle form have been studied by a transfer matrix method. Transmission coefficient was calculated systematically as a function of incident electron energy. The dependence of the various parameters such as well width, barrier height and barrier width on the spectrum shows distinctive features. The resonant energy is influenced even by the barrier width. When the barrier becomes thick and/or high, the resonant peak becomes sharpened and shifted to the higher energy. Even if the thickness and the height of the barriers are constant, the form of the triangular barrier affects the resonant energy. On the contrary, the triangular double barrier structure is less sensitive to the well width compared with a rectangular double barrier structure.