正多边形量子环链自旋输运性质研究

A Research on the Spin Transport Oroperties of Polygonal Quantum Ring Chain

研究了考虑Rashba自旋轨道耦合的任意正多边形量子环链的自旋输运性质.当不考虑Rashba自旋轨道耦合时,量子环链中电子的透射电导不发生自旋极化和翻转;当考虑Rashba自旋轨道耦合时,Rashba自旋轨道耦合可以控制量子环链中电导的极化.点连接的量子环链透射电导存在奇偶震荡现象,线连接的量子环链透射电导的极小值不随链长度变化.

The spin transport properties of the equilateral polygonal quantum rings chain with Rashba spin-orbit coupling are studied. The spin polarized conductance can not occur when the Rashba spin-orbit coupling is not considered. When the Rashba spin-orbit coupling is considered,the spin polarization of the conductance in a polygonal quantum rings chain can be controlled by the Rashba spin-orbit coupling. And odd-even parity oscillations of spin polarization of the electrons through the point connected quantum rings chain are found. In addition,the location of the minimum conductance of the side connected quantum rings chain is independent with the length of the chain.