  We study the resonant tunneling properties of an electron through a few types
of binary periodic and aperiodic multibarrier systems. Within the framework of
the effective-mass approximation, we calculate the transmission coefficients to
investigate the dependence of the transmission resonances on the system
parameters such as the kind of aperiodicity, the generation number, and the
widths of the wells and barriers. Similarities and differences of the
resonances between the binary periodic and aperiodic systems are discussed in
detail. Transmission resonances in aperiodic systems are found to be
characterized by complex resonance splitting and a variety of peak-to-valley
ratios which are not exhibited in the periodic system. For some energy ranges,
transmission resonances in aperiodic systems are also found to resemble those
in the periodic system, despite the existence of aperiodicity.

Mesoscale and Nanoscale Physics;Disordered Systems and Neural Networks