Wang Xiaofei, Liu Xiaojie, Zhao Xueyang, Yin Haitao, Wan Weilong, Feng Li
J Nanosci Nanotechnol. 2014 Mar;14(3):2674-8. doi: 10.1166/jnn.2014.8485.
The spin polarized transport properties through an Aharonov-Bohm ring embedded with a double quantum dot-molecule in each arm with Rashba spin-orbit (RSO) interaction is theoretically studied in the framework of the equation of motion of Green's function. Based on molecular state representation, the anti-resonance phenomenon in the conductance spectrum is readily explained. We found that the position of antiresonant peaks in conductance spectrum is determined by the interdot coupling strengths. Moreover, the magnitude of conductance of each spin component can be manipulated by the Rashba spin orbit interaction strength. Especially only one spin component electron can be allowed to transport through this structure by modulating the strength of RSO interaction properly.
在格林函数运动方程的框架下，从理论上研究了通过一个阿哈罗诺夫 - 玻姆环的自旋极化输运性质，该环的每个臂中都嵌入了一个具有拉什巴自旋轨道（RSO）相互作用的双量子点分子。基于分子态表示，很容易解释电导谱中的反共振现象。我们发现，电导谱中反共振峰的位置由量子点间的耦合强度决定。此外，每个自旋分量的电导大小可以通过拉什巴自旋轨道相互作用强度来操控。特别是，通过适当调制RSO相互作用的强度，仅能允许一个自旋分量的电子通过该结构进行输运。
