Spin-dependent transport through an interacting quantum dot system
Huang Rui (黄睿)a, Wu Shao-Quan (吴绍全)b, Yan Cong-Hua (闫从华)b
a College of Sciences, Southwest Petroleum University, Nanchong 637001, China; b College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China
Abstract Using an equation of motion technique, we report on a theoretical analysis of transport characteristics of a spin-valve system formed by a quantum dot coupled to ferromagnetic leads, whose magnetic moments are oriented at an angle with respect to each other, and a mesoscopic ring by the Anderson Hamiltonian. We analyse the density of states of this system, and our results reveal that the density of states show some noticeable characteristics depending on the relative angle of magnetic moment M, and the spin-polarised strength P in ferromagnetic leads, and also the magnetic flux and the number of lattice sites NR in the mesoscopic ring. These effects might have some potential applications in spintronics.
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