Spin-dependent transport through an interacting quantum dot system

doi:10.1088/1674-1056/19/7/077302

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 77302-077302.doi: 10.1088/1674-1056/19/7/077302

Spin-dependent transport through an interacting quantum dot system

吴绍全¹, 闫从华¹, 黄睿²

(1)College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China; (2)College of Sciences, Southwest Petroleum University, Nanchong 637001, China

出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the Youth Research Fund of Southwest Petroleum University.

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

Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the Youth Research Fund of Southwest Petroleum University.

摘要/Abstract

摘要： 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 θ 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 θ of magnetic moment M, and the spin-polarised strength P in ferromagnetic leads, and also the magnetic flux Φ and the number of lattice sites N_R in the mesoscopic ring. These effects might have some potential applications in spintronics.

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 $\theta$ 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 $\theta$ of magnetic moment M, and the spin-polarised strength P in ferromagnetic leads, and also the magnetic flux $\varPhi$ and the number of lattice sites N_R in the mesoscopic ring. These effects might have some potential applications in spintronics.

Key words: Kondo effect, spin-polarised transport, density of states

中图分类号: (Quantum dots)

73.63.Kv

72.25.-b (Spin polarized transport) 75.30.Cr (Saturation moments and magnetic susceptibilities)

黄睿, 吴绍全, 闫从华. Spin-dependent transport through an interacting quantum dot system[J]. 中国物理B, 2010, 19(7): 77302-077302.

Huang Rui (黄睿), Wu Shao-Quan (吴绍全), Yan Cong-Hua (闫从华). Spin-dependent transport through an interacting quantum dot system[J]. Chin. Phys. B, 2010, 19(7): 77302-077302.

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Spin-dependent transport through an interacting quantum dot system

Spin-dependent transport through an interacting quantum dot system

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