In the presence of magnetic flux, the coherent spin transport property of electron in 4-terminalrnmesoscopic quantum network was studied by solving linear equations. The 4-terminal network was made ofrnquantum wire with Rashba spin-orbit coupling interaction. It was numerically calculated to study how the spinrnconductance is dependent on reduced flux and spin-orbit coupling strength. The calculation results show thatrnthe coherent spin transport property of electron in the network is determined by the interplay of reduced fluxrnand Rashba spin-orbit coupling. Some terminals in this structure can act as gates to control the spin current inrnother terminals. Such a 4-terminal and multi-channel structure may provide more options of controlling methodsrnfor the coherent spin transport of electron.%采用解线性方程组的方法,研究了存在磁通时,四端介观量子网络中电子自旋的相干输运性质.该四端网络由具有Rashba自旋-轨道耦合互作用的量子线构成,数值计算了自旋电导对约化磁通和自旋-轨道耦合强度的依赖关系.计算结果表明:该网络中的自旋相干输运性质由约化磁通和Rashba自旋-轨道耦合之间的相互作用共同决定.这种结构中,一些端可以作为栅极控制其他端的自旋流,该四端多通道网络结构为调控电子自旋的相干输运提供了更多的选择.
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