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研究了与铁磁/半导体/铁磁结构相关的双量子环自旋输运的规律,研究结果表明:总磁通为零条件下,铁磁电极磁化方向反平行时,双量子环与单量子环相比提高了自旋电子透射概率的平均值.铁磁电极磁化方向平行时,双量子环对提高自旋向下电子平均透射概率的效果更明显;双量子环受到Rashba自旋轨道耦合作用影响时,自旋电子的平均透射概率明显高于单量子环,即使再加上外加磁场的影响,透射概率较高这一特征依然存在;双量子环所含的δ势垒具有阻碍自旋电子输运的作用,随δ势垒强度Z的增大透射概率将会单调、非线性地减小.
The results show that when the magnetization direction of the ferromagnetic electrode is anti-parallel, the double-quantum-rings and the single-quantum-dots Ring compared to the average increase of the probability of the spin electron transmission.When the magnetization direction of the ferromagnetic electrode is parallel, the effect of the double quantum ring on increasing the average transmission probability of spin down electron is more obvious; double quantum ring is subjected to Rashba spin-orbit coupling , The average transmission probability of spintrons is significantly higher than that of single quantum ring. Even with the influence of external magnetic field, the transmission probability is still high. The δ barrier contained in double quantum rings has the potential of blocking spintronic electrons The role of transport, with the δ barrier strength Z increases the transmission probability monotonous, non-linearly reduced.