| Abstract: | Spin related conductance and polarization via an open ballistic quantum nanoringconnected to one input lead and two output ones are studied by considering the Rashbaeffect based on the transfer matrix method. Our probes show that controlling on Rashbastrength leads to 100 percent spin polarization while we have high efficiency for thesystem. In addition, it is possible to design the position of input and output leads insuch a way as to optimize the system to work as a spin filtering or spin switching nanodevice. Also, this apparatus can work as a Stern-Gerlach tool which can be used in someimportant practical nano-industrial applications. By controlling on Rashba strength in aspecial design of two output lead positions, it is possible to divide the input chargecurrent into any output ones while the partial output charge current has substantial valuein one of two output leads and it is reduced in the other one simultaneously. Bycontrolling on Rashba strength in a special design of output lead positions, the spinconductance can attain a considerable value in one output lead despite an insignificantvalue in the other one simultaneously. |
