CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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 |
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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 NR in the mesoscopic ring. These effects might have some potential applications in spintronics.
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Accepted manuscript online:
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PACS:
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73.63.Kv
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(Quantum dots)
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72.25.-b
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(Spin polarized transport)
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75.30.Cr
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(Saturation moments and magnetic susceptibilities)
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Fund: Project supported by the Youth Research Fund of Southwest Petroleum University. |
Cite this article:
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 2010 Chin. Phys. B 19 077302
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[1] |
Baibich M N, Broto J M, Fert A, Nguyen V D F, Pteroff F, Etienne P, Creuzet G, Friederich A and Chazelas J 1988 Phys. Rev. Lett. 61 2472
|
[2] |
Julliere M 1975 Phys. Lett. A 54 225
|
[3] |
Wang B G, Wang J and Guo H 2001 J. Phys. Soc. Jpn. 70 2645
|
[4] |
Tsukagoshi K, Alphenaar B W and Ago H 1999 Nature 401 573
|
[5] |
Sheng L, Cheng Y, Teng H Y and Ting C S 1999 Phys. Rev. B bf 59 480
|
[6] |
Wu S Q 2009 Acta Phys. Sin. 58 4175 (in Chinese)
|
[7] |
Slonczewski J C 1989 Phys. Rev. B 39 6995
|
[8] |
Yang F B, Wu S Q, Yan C H, Huang R, Hou T and Bi A H 2008 Chin. Phys. B 17 1383
|
[9] |
Chen X W, Chen B J, Shi Z G and Song K H 2009 Acta Phys. Sin. 58 2720 (in Chinese)
|
[10] |
Martinek J, Utsumi Y, Imamura H, Barnas J, Maekawa S, Konig J and Schon G 2003 Phys. Rev. Lett. 91 127203
|
[11] |
Meir Y, Wingreen N S and Lee P A 1993 Phys. Rev. Lett. 70 2601
|
[12] |
Zhang P, Xue Q K, Wang Y P and Xie X C 2002 Phys. Rev. Lett. 89 286803
|
[13] |
Yan C H, Wu S Q, Huang R and Sun W L 2008 Chin. Phys. B bf 17 296
|
[14] |
L"u R and Liu Z R 2007 Chin. Phys. Lett. 24 159
|
[15] |
Kicheon K 2001 Phys. Rev. B 65 033302
|
[16] |
Thimm W B, Kroha J and Delft J V 1999 Phys. Rev. Lett. 82 2143
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