Magnetotransport through an Aharonov－Bohm ring with parallel double quantum dots coupled to ferromagnetic leads

doi:10.1088/1674-1056/19/4/047202

Abstract Using the Keldysh nonequilibrium Green function and equation-of-motion technique, this paper studies the magnetotransport through an Aharonov--Bohm (AB) ring with parallel double quantum dots coupled to ferromagnetic leads. It calculates the transmission probability in both the equilibrium and the nonequilibrium case, analyses the conductance and the tunnel magnetoresistance for various parameters, and obtains some new results. These results show that this system is provided with an excellent spin filtering property, and that a large tunnelling magnetoresistance and a negative tunnelling magnetoresistance can arise by adjusting relative parameters; these facts indicate that this system is a possible candidate for spin valve transistors, and has important applications in spintronics.

Keywords: Kondo effect double quantum dots Aharonov--Bohm ring magnetoresistance

Received: 23 June 2009
Revised: 08 August 2009
Accepted manuscript online:

PACS:	73.63.Kv	(Quantum dots)
	72.20.My	(Galvanomagnetic and other magnetotransport effects)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	85.70.Kh	(Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc.)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund: Project supported by the Scientific Research Fund of the Education Department of Sichuan Province of China (Grant No.~2006A069) and Funds for Major Basic Research Project of Sichuan Province of China (Grant No.~2006J13-155).

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Wu Shao-Quan(吴绍全), Hou Tao(侯涛), Zhao Guo-Ping(赵国平), and Yu Wan-Lun(余万伦) Magnetotransport through an Aharonov－Bohm ring with parallel double quantum dots coupled to ferromagnetic leads 2010 Chin. Phys. B 19 047202

[1]	Prinz G A 1998 Science 282 1660
[1a]	Wolf S A and Treger D M 2001 Science 294 1488
[2]	Lu R and Liu Z R 2002 cond-mat/0210350
[2a]	Yan C H, Wu S Q, Huang R and Sun W L 2008 Chin. Phys. B 17 296
[2b]	Yang F B, Wu S Q, Yan C H, Huang R, Hou T and Sun W L 2008 Chin. Phys. B 17 1383
[3]	Hewson A C 1993 The Kondo Problem to Heavy Fermions} (Cambridge: Cambridge University Press)
[3a]	Goldhaber-Gordon D, Shtrikman H, Mahalu D, Abusch Magder D, Meirav U and Kastner M A 1998 Nature 391 156
[3b]	Cronenwett S M, Oosterkamp T H and Kouwenhoven L P 1998 Science 281 540
[4]	Sun Q F, Guo H and Lin T H 2001 Phys. Rev. Lett. 87 176601
[4a]	Kouwenhoven L P and Glazman L 2001 Phys. World 14 33
[5]	Georges A and Meir Y 1999 Phys. Rev. Lett. 82 3508
[5a]	Aguado R and Langreth D C 2000 Phys. Rev. Lett. 85 1946
[6]	Wu S Q, Wang S J, Sun W L and Yu W L 2004 Chin. Phys. 13 510
[6a]	Wu S Q, He Z, Yan C H, Chen X W and Sun W L 2006 Acta Phys. Sin. 55 1413 (in Chinese)
[6b]	Wu S Q, Sun W L, Yu W L and Wang S J 2005 Acta Phys. Sin. 54 2910 (in Chinese)
[6c]	Zhou B, Wu S Q, Sun W L and Zhou X L 2004 Chin. Phys. 13 225
[7]	Yoffe A D 2001 Adv. Phys. 50 1
[7a]	Loss D and Divincenzo D P 1998 Phys. Rev. A 57 120
[7b]	Chen M L and Wang S J 2007 Chin. Phys. 16 2101
[8]	Song H Z, Zhang P, Duan S Q and Zhao X G 2006 Chin. Phys. 15 2130
[8a]	Bj?rn K and Jürgen K 2002 Phys. Rev. B 65 245301
[8b]	Boese D, Hofstetter W and Schoeller H 2002 Phys. Rev. B 66 125315
[9]	Izumida W and Sakai O 2000 Phys. Rev. B 62 10260
[9a]	Deng Y X, Yan X H and Tang N S 2006 Acta Phys. Sin. 55 2027 (in Chinese)
[10]	Jones B A, Varma C M and Wilkins J W 1998 Phys. Rev. Lett. 61 125
[11]	Ng T K 1996 Phys. Rev. Lett. 76 487
[11a]	Zhang P, Xue Q K, Wang Y P and Xie X C 2002 Phys. Rev. Lett. 89 286803
[12]	Meir Y and Wingreen N S 1992 Phys. Rev. Lett. 68] 2512
[12a]	Jauho A P, Wingreen N S and Meir Y 1994 Phys. Rev. B 50 5528
[13]	Martinek J, Utsumi Y, Imamura H, Barnas J, Maekawa S, K?nig J and Sch?n G 2003 Phys. Rev. Lett. 91 127203
[13a]	Sergueev, Sun Q F, Guo H, Wang B G and Wang J 2002 Phys. Rev. B 65 165303
[13b]	Wang J M, Wang R and Liang J Q 2007 Chin. Phys. 16 2075
[14]	\'Swirkowicz R, Barna\'s J and Wilczy\'nski M 2003 Phys. Rev. B 68 195318

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Magnetotransport through an Aharonov－Bohm ring with parallel double quantum dots coupled to ferromagnetic leads

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