Spin transport in a chain of polygonal quantum rings with Dresselhaus spin–orbit coupling**Project supported by the National Natural Science Foundation of China (Grant Nos. 61176089 and 11504083) and the Foundation of Shijiazhuang University, China (Grant No. XJPT002).

Abstract

Using a transfer matrix method, we investigate spin transport through a chain of polygonal rings with Dresselhaus spin–orbit coupling (DSOC). The spin conductance is dependent on the number of sides in the polygons. When DSOC is considered in a chain which also has Rashba spin–orbit coupling (RSOC) of the same magnitude, the total conductance is the same as that for the same chain with no SOC. However, when the two types of SOC have different values, there results a unique anisotropic conductance.