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研究了含δ势垒的铁磁/半导体/铁磁异质结中自旋相关的透射概率和渡越时间,讨论了量子尺寸效应和Rashba自旋轨道耦合效应对隧穿特性的影响.研究结果表明:δ势垒的存在降低了自旋电子的透射概率,改变了透射概率的位相.Rashba自旋轨道耦合强度的增加加大了透射概率的振荡频率.不同自旋取向的电子隧穿异质结时,渡越时间随着半导体长度、Rashba自旋轨道耦合强度以及两铁磁电极中的磁化方向的夹角的变化而变化.
The spin-related transmission probability and transit time in the ferromagnetic / semiconductor / ferromagnetic heterojunction with δ-barrier were investigated, and the effect of quantum size effect and Rashba spin-orbit coupling on the tunneling properties was discussed. Results The results show that the presence of δ barrier reduces the transmission probability of spintrons and changes the phase of transmission probability.The increase of Rashba spin-orbit coupling strength increases the oscillation frequency of transmission probability.The electron tunneling heterogeneities with different spin orientations At the junction, the transit time varies with the length of the semiconductor, the Rashba spin-orbit coupling strength, and the angle between the two ferromagnetic electrodes.