The electron transport characters in a nanostructure with the periodic magnetic-electric barriers

This paper detailedly studies the transmission probability, the spinpolarization and the conductance of the ballistic electron in ananostructure with the periodic magnetic-electric barriers. Theseobservable quantities are found to be strongly dependent not only onthe magnetic configuration, the incident electron energy and theincident wave vector, but also on the number of the periodicmagnetic-electric barriers. The transmission coefficient and the spinpolarization show a periodic pattern with the increase of theseparation between two adjacent magnetic fields, and the resonancesplitting increases as the number of periods increases. Surprisingly,it is found that a polarization can be achieved by spin-dependentresonant tunnelling in this structure, although the average magneticfield of the structure is zero.