A spin switch device based on a triple quantum dots superlattice using the Dicke effect

• 作 者: 安兴涛 穆惠英 咸立芬 刘建军
• 机 构: School of Sciences, Hebei University of Science and Technology,SKLSM, Institute of Semiconductors, C
• 出 处: Chinese Physics B
• 发表日期: 2012年07期
• 关键词: triple Dicke switch parity tuning helpful fabricate tunneling conductance orbit

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 εc = 0 due to the spin-dependent Fano and Dicke effects induced by the quantum interference and the Rashba spin-orbit 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 εc = 0 due to the spin-dependent Fano and Dicke effects induced by the quantum interference and the Rashba spin-orbit 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.