Abstract
We study theoretically the transmission coefficients and thespin-tunneling time in ferromagnetic/semiconductor/ferromagneticthree-terminal heterojunction in the presence of Rashba spin-orbitinteraction, in which one-dimensional quantum waveguide theory isdeveloped and applied. Based on the group velocity concept and theparticle current conservation principle, we calculate thespin-tunneling time as the function of the intensity of Rashbaspin-orbit coupling and the length of the semiconductor. We findthat as the length of the semiconductor increases, thespin-tunneling time does not increase linearly but shows behaviorof slight oscillation. Furthermore, with the increasing of thespin-orbit coupling, the spin-tunneling time increases.
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