| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Triple Quantum Dot Molecule as a Spin-Splitter |
| CHI Feng, YUAN Xi-Qiu |
| Department of Physics, Bohai University, Jinzhou 121000 |
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| Cite this article: |
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CHI Feng, YUAN Xi-Qiu 2009 Chin. Phys. Lett. 26 097301 |
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Abstract We propose a spin-splitter composed of triple quantum dots that works due to the Coulomb blockade effect and the charge and spin biases applied on external electron source and drains. The spin biases are applied only on the two drains and give their spin-dependent chemical potentials, which act as the driving forces for electron spin-polarized transport. By tuning the biases and the dots' levels, spin-up and spin-down electrons can be simultaneously split or separated from the source into two different drains. We show that such a tunneling process is detectable in terms of the spin accumulations on the dots or the currents flowing through the external leads. The present device is quite simple and realizable within currently existing technologies.
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| Keywords:
73.23.-b
72.25.-b
73.40.Gk
85.75.-d
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Received: 31 May 2009
Published: 28 August 2009
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| PACS: |
73.23.-b
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(Electronic transport in mesoscopic systems)
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72.25.-b
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(Spin polarized transport)
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73.40.Gk
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(Tunneling)
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85.75.-d
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(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
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[1] Fert A 2008 Rev. Mod. Phys. 80 1517
[2] Gr\"{unberg P A 2008 Rev. Mod. Phys. 80 1531
[3] \u{Zuti\'{c I, Fabian J and Sarma S D 2004 Rev.Mod. Phys. 76 323
[4] Guo Y, Qin J G, Chen X Y and Gu B L 2003 Chin. Phys.Lett. 20 1124
[5] Li S S, Chang K and Xia J B 2003 Phys. Rev. B 68 245306
[6] Li S S, Abliz A, Yang F H, Niu Z C, Feng S L and Xia J B2002 J. Appl. Phys. 92 6662 Li S S, Abliz A, Yang F H, Niu Z C, Feng S L and Xia J B2003 J. Appl. Phys. 94 5402
[7] Wu M W, Zhou J and Shi Q W 2004 Appl. Phys. Lett. 85 1012
[8] Li S S and Xia J B 2007 Appl. Phys. Lett. 91092119
[9] Li Y X 2008 Chin. Phys. Lett. 25 3739
[10] Yin H T, L\"{u T Q, Liu X J and Xue H J 2009 Chin.Phys. Lett. 26 047302
[11] Loss D and DiVincenzo 1998 Phys. Rev. A 57120
[12] Li S S, Long G L, Bai F S, Feng S L and Zheng H Z 2001 Pro. Natl. Acad. Sci. USA 98(21) 11847
[13] Hanson R, Kouwenhoven L P, Petta J R, Tarucha S andVandersypen L M K 2007 Rev. Mod. Phys. 79 1217
[14] Datta S and Das B 1990 Appl. Phys. Lett. 56665
[15] Sun Q F, Wang J and Guo H 2005 Phys. Rev. B 71 165310
[16] Sun Q F and Xie X C 2006 Phys. Rev. B 73235301
[17] L\"{u H F and Guo Y 2007 Phys. Rev. B 76045120
[18] L\"{u H F and Guo Y 2008 Appl. Phys. Lett. 92 062109
[19] Chi F and Zheng J 2008 Appl. Phys. Lett. 92062106
[20] Chi F, Zheng J and Sun L L 2008 Appl. Phys. Lett. 92 172104
[21] Li S S and Xia J B 2008 Appl. Phys. Lett. 92022102
[22] Zhang Y T, Song Z F and Li Y C 2008 Phys. Lett. A 373 144
[23] Zhang Y T and Li Y C 2008 Phys. Lett. A 3722127
[24] Wang D K, Sun Q F and Guo H 2004 Phys. Rev. B 69 20531
[25] Chi F and Li S S 2005 Chin. Phys. Lett. 222035
[26] Sun Q F, Xing Y X and Shen S Q 2008 Phys. Rev. B 77 195313
[27] Lu H Z and Shen S Q 2008 Phys. Rev. B 77235309
[28] Frolov S M, Venkatesan A, Yu W and Folk J A 2009 Phys. Rev. Lett. 102 116802
[29] Saraga D S and Loss D 2003 Phys. Rev. Lett. 90 166803
[30] Lu H Z, L\"{u R and Zhu B F 2006 J. Phys.: Condens.Matter 18 8961
[31] Here we use those typical parameters from Souza F M,Egues J C and Jauho A P 2007 Phys. Rev. B 75 165303
[32] Kato Y K, Myers R C, Gossard A C and Awschalom 2004 Science 306 1910
[33] Wunderlich J, Kaestner B, Sinova J and Jungwirth T 2005 Phys. Rev. Lett. 94 047204
[34] Valenzuela O and Tinkham M 2006 Nature 442176 |
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