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

doi:10.1088/1674-1056/21/7/077201

Abstract 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 ε_c = 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.

Keywords: spin polarization quantum dots

Received: 28 December 2011
Revised: 18 January 2012
Accepted manuscript online:

PACS:	72.25.Dc	(Spin polarized transport in semiconductors)
	73.23.-b	(Electronic transport in mesoscopic systems)
	85.35.Ds	(Quantum interference devices)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11047184, 11104059, and 61176089) and the Hebei Province Natural Science Foundation, China (Grant No. A2011208010).

Corresponding Authors: An Xing-Tao
E-mail: anxt2005@163.com

Cite this article:

An Xing-Tao(安兴涛), Mu Hui-Ying(穆惠英), Xian Li-Fen(咸立芬), and Liu Jian-Jun(刘建军) A spin switch device based on a triple quantum dots superlattice using the Dicke effect 2012 Chin. Phys. B 21 077201

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

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