中文摘要：

利用转移矩阵法计算了含周期性Dresselhaus自旋轨道耦合量子线中电子的透射率．结果表明周期性的Dresselhaus自旋轨道耦合会使透射率产生一定宽度的能隙，通过调节自旋轨道耦合强度或者周期单元中两区域的比例长度可以控制能隙的宽度．进一步研究表明当电子入射的能量在能隙范围内的时候，电子被禁止通过，而在能隙外时，电子可以通过，从而实现“关”和“开”的状态．这些效应说明所研究的体系也许能用来设计纳米电子器件．

英文摘要：

The electron transmission of a Dresselhaus Quantum Wire （QW） is calculated with the transfer matrix method. The transmission gaps can emerge as a result of the effects of the Dresselhaus Spin-Orbit Coupling （SOC）. The width of the gap also can be controlled by the length ratios of each segment or the strengths of SOC. Further studies show that when the incident electrons with energies is within this gap, electrons cannot transmit through the quantum wire; when it is beyond, they can transmit. Hence the switch effect of ＂ON＂ and ＂OFF＂ can be achieved. Those results may provide an effective way to design a nanometer electronic device.