  Electronic transport with a line (or a few lines) of Anderson type disorder
in a zigzag graphene nanoribbon is investigated in presence of Rashba
spin-orbit interaction. Such line disorders give rise to peculiar behavior in
both charge as well as spin-polarized transmission in the following sense. In
the weak disorder regime, the charge transport data show Anderson localization
up to a certain disorder strength, beyond which the extended states emerge and
start dominating over the localized states. These results are the hallmark
signature of a selectively disordered (as opposed to bulk disorder) graphene
nanoribbon. However, the spin-polarized transport shows a completely
contradicting behavior. Further, the structural symmetries are shown to have an
important role in the spintronic properties of the nanoribbons. Moreover, the
edge-disorder scenario (disorder selectively placed at the edges) seems to hold
promise for the spin-filter and switching device applications.
