Abstract Using an equation-of-motion technique, we theoretically study the Fano--Kondo effect in the T-shaped double quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. We calculate the density of states in this system with both parallel and antiparallel lead-polarization alignments, and our results reveal that the interdot coupling, the spin-polarized strength and the energy level of the side coupled quantum dot greatly influence the density of states of the central quantum dot. This system is a possible candidate for spin valve transistors and may have potential applications in the spintronics.
Received: 20 May 2008
Revised: 17 July 2008
Accepted manuscript online:
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: Project supported by the Scientific
Research Funds of Education Department of Sichuan Province (Grant No
2006A069), the Major Basic Research Project of Sichuan Province
(Grant No 2006J13-155), and the Scientific Research Innovation for
Postgraduates of Si
Cite this article:
Hou Tao(侯涛), Wu Shao-Quan(吴绍全), Bi Ai-Hua(毕爱华), Yang Fu-Bin(羊富彬), Chen Jia-Feng(陈嘉峰), and Fan Meng(樊梦) Fano--Kondo effect in the T-shaped double quantum dots coupled to ferromagnetic leads 2009 Chin. Phys. B 18 783
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