Decoupled states and anti-resonance in the Aharonov-Bohm interferometer with embodied quantum-dot ring

Wu Li-Jun; Han Yu; Gong Wei-Jiang; Tan Tian-Ya

doi:10.7498/aps.60.107303

Abstract

Using the Anderson model Hamiltonian and the non-equilibrium Green's function method, the decoupled states and antiresonance presenting in the electronic transport through N-quantum-dot ring embodied in A-B interferometer are studied theoretically. We find that the symmetry of the coupled-dot system and the magnetic flux through the Aharonov-Bohm (A-B) interferometer are two physical mechanisms responsible for the decoupled states. Even-odd parity oscillations occur in linear conductance spectra of such a highly symmetric quantum dot ring, due to even or odd molecular state decoupling from the leads by tuning the structure parameters, i.e., the magnetic flux. The results provide a new model for the designing of the nano-device.

Keywords:

Authors and contacts

1.
Department of Physics, Liaoning University, Shenyang 110036, China;
2.
School of science, Shenyang Ligong University, Shenyang 110159, China;
3.
College of Sciences, Northeastern University, Shenyang 110004, China

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Cited By

[1]	Lovett B W, Reina J H, Nazir A, Briggs G A 2003 Phys. Rev. B 68 205319
[2]	Zytic I, Fabian J, Sarma S D 2004 Rev. Mod. Phys. 76 323
[3]
[4]
[5]	Xue H B, Zhang H Y, Nie Y H, Li Z J, Liang J Q 2010 Chin. Phys. B 19 047303
[6]
[7]	Wu S Q 2009 Acta Phys. Sin. 58 4175 (in Chinese)[吴绍全 2009 58 4175 ]
[8]	Scott-Thomas J H F, Field S B, Kastner M A, Smith H I, Antoriadis D A 1989 Phys. Rev. Lett. 62 583
[9]
[10]
[11]	Zhang Y, DiCarlo L, McClure D T, Yamamoto M, Tarucha S,Marcus C M, Hanson M P, Gossard A C 2007 Phys. Rev. Lett. 99 036603
[12]
[13]	Kouwenhoven L P, Vaar N C van der, Johnson A T, Kool W, Harmans C J P M, Williamson J G, Staing A A M, Foxon C T Z 1991 Phys. B 85 367
[14]
[15]	Cronenwett S M, Oosterkamp T H, Kouwenhoven L 1998 Science 281 540
[16]	Heary R J, Han J E, Zhu L 2008 Phys. Rev. B 77 115132
[17]
[18]
[19]	Wu S Q, He Z, Yan C H, Chen X W, Sun W L 2006 Acta Phys. Sin. 55 1413 (in Chinese)[吴绍全、何忠、阎从华、谌雄文、孙威立 2006 55 1413 ]
[20]
[21]	Wu S Q, Sun W L, Yu W L, Wang S J 2005 Acta Phys. Sin. 54 2910 (in Chinese)[吴绍全、孙威立、余万伦、王顺金 2005 54 2910 ]
[22]	Sigrist M, Ihn T, Ensslin K, Reinwald M, Wegscheider W 2007 Phys. Rev. Lett. 98 036805
[23]
[24]	Fano U., 1961 Phys. Rev. 124 1866
[25]
[26]
[27]	Yin Y Q, Li H, Ma J N, He Z L,Wang X Z 2009 Acta Phys. Sin. 58 4162 (in Chinese)[尹永琦、李华、马佳宁、贺泽龙、王选章 2009 58 4162 ]
[28]
[29]	Lu H, Lu R, Zhu B F 2005 Phys. Rev. B 71 235320
[30]	Sun Q F, Wang J, Gou H 2005 Phys. Rev. B 71 165310
[31]
[32]
[33]	Wu S Q, Hou T, Zhao G P, Li Z J, Yu W L 2010 Chin. Phys. B 19 047202
[34]	Chen X W, He D J, Wu S Q, Song K H 2006 Acta Phys. Sin. 55 4287 (in Chinese)[谌雄文、贺达江、吴绍全、宋克慧 2006 55 4287 ]
[35]
[36]
[37]	Chen X W, Chen B J, Shi Z G, Song K H 2009 Acta Phys. Sin. 58 2720 (in Chinese)[谌雄文、谌宝菊、施振刚、宋克慧 2009 58 2720 ]
[38]	Voo K-K, Chu C S 2006 Phys. Rev. B 74 155306
[39]
[40]
[41]	Ordonez G, Na K, Kim S 2006 Phys. Rev. A 73 022113
[42]	Wang X R, Wang Y, Sun Z Z 2002 Phys. Rev. B 65 193402
[43]
[44]	Bao K, Zheng Y S 2005 Phys. Rev. B 73 045306
[45]
[46]
[47]	Orellana P A,Domnguez-Adame F, Gez I, Ladrn M L, Guevara de 2003 Phys. Rev. B 67 085321
[48]	Santors L F, Dykman M I 2003 Phys. Rev. B 68 214410
[49]
[50]
[51]	Wu M W, Zhou J, Shi Q W 2004 Appl. Phys. Lett. 85 1012
[52]
[53]	Shi Q W, Zhou J, Wu M W 2004 Appl. Phys. Lett. 85 2547
[54]
[55]	Han Y, Gong W J, Wu H N, Wei G Z 2009 Phys. B 404 2001
[56]
[57]	Gong W J, Han Y, Wei G Z 2009 J. Phys. 21 175801
[58]	Kubala B, Kongin J 2002 Phys. Rev. B 65 245301
[59]
[60]
[61]	Seidl S, Kroner M, Dalgarno P A, Smith J M, Ediger M, Gerardot B D, Garcia J M, Petroff P M, Karrai K, Warburton R J 2005 Phys. Rev. B 72 195339
[62]
[63]	Warburton R J, Durr C S, Karrai K, Kotthaus J P, Medeiros-Ribeiro G, Petroff P M 1997 Phys. Rev. Lett. 79 5282
[64]
[65]	Tae-Suk K, Hershfield S 2002 Phys. Rev. B 65 214526

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Vol. 60, Issue 10 - 2011-05-20

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