  An amazingly simple model of correlated disorder is a one-dimensional chain
of n potential steps with a fixed width lc and random heights. A theoretical
analysis of the average transmission coefficient and Landauer resistance as
functions of n and klc predicts two distinct regimes of behavior, one marked by
extreme sensitivity and the other associated with exponential behavior of the
resistance. The sensitivity arises in n and klc for klc approximately pi, where
the system is nearly transparent. Numerical simulations match the predictions
well, and they suggest a strong motivation for experimental study.
