  Klein tunneling and conductance for Dirac fermions in ABC-stacked trilayer
graphene (ABC-TLG) through symmetric and asymmetric double potential barriers
are investigated using the two and six-band continuum model. Numerical results
for our system show that the transport is sensitive to the height, the width
and the distance between the two barriers. Klein paradox at normal incidence
and resonant features at non-normal incidence in the transmission result from
resonant electron states in the wells or hole states in the barriers and
strongly influence the ballistic conductance of the structures.
