摘要
Spin-dependent transport in a triple quantum dots superlattice system with a bridge coupling to two leads is studied. There exists an odd even parity oscillation of spin polarization at the central dot level cc = 0 due to the spin-dependent Fano and Dicke effects induced by the quantum interference and the Rashba spin^rbit interaction. In the case of even numbers of triple quantum dots, the device can be used as a spin switch by tuning the energy difference h between the energies of the central and the lateral dots. These results may be helpful to design and fabricate practical spintronic devices.
Spin-dependent transport in a triple quantum dots superlattice system with a bridge coupling to two leads is studied. There exists an odd even parity oscillation of spin polarization at the central dot level cc = 0 due to the spin-dependent Fano and Dicke effects induced by the quantum interference and the Rashba spin^rbit interaction. In the case of even numbers of triple quantum dots, the device can be used as a spin switch by tuning the energy difference h between the energies of the central and the lateral dots. These results may be helpful to design and fabricate practical spintronic devices.
基金
Project supported by the National Natural Science Foundation of China (Grant Nos. 11047184, 11104059, and 61176089)
the Hebei Province Natural Science Foundation, China (Grant No. A2011208010)
