Aharonov–Bohm ring with a side-coupled quantum dot array as a spin switch

Xing-Tao An; Jian-Jun Liu
May 2010
Applied Physics Letters;5/31/2010, Vol. 96 Issue 22, p223508
Academic Journal
We study the spin polarization and the spin accumulation in an Aharonov–Bohm ring structure, in which a quantum dot (QD) array is side-coupled to one arm of the ring and the Rashba spin-orbit interaction exists in the other. The device can be as a spin switch by decreasing the tunneling coupling between the QD array and the ring. Moreover, we find that the spin polarization and the spin accumulation in the QD are affected by the number of the QDs in the QD array and can be controlled by the strength of the Rashba spin-orbit interaction and the bias on the Aharonov–Bohm ring.


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