Spin-Tunneling Time in Ferromagnetic/Semiconductor/Ferromagnetic Three-Terminal Heterojunction in the Presence of Rashba Spin-Orbit Coupling |
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Authors: | ZHANG Ying-Tao XIE Zun LI You-Cheng |
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Institution: | College of Physics,Hebei Normal University,Shijiazhuang,050016,China;Institute of Physics,Hebei University of Technology,Tianjin,300130,China College of Physics,Hebei Normal University,Shijiazhuang,050016,China College of Physics,Hebei Normal University,Shijiazhuang,050016,China |
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Abstract: | We study theoretically the transmission coefficients and the spin-tunneling time in ferromagnetic/semiconductor/ferromagnetic three-terminal heterojunction in the presence of Rashba spin-orbit interaction, in which onedimensional quantum waveguide theory is developed and applied. Based on the group velocity concept and the particle current conservation principle, we calculate the spin-tunneling time as the function of the intensity of Rashba spin-orbit coupling and the length of the semiconductor. We find that as the length of the semiconductor increases, the spintunneling time does not increase linearly but shows behavior of slight oscillation. Furthermore, with the increasing of the spin-orbit coupling, the spin-tunneling time increases. |
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Keywords: | spin-tunneling time three-terminal heterojunction spin-orbit coupling |
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