摘要We theoretically investigate the spin-polarized transport properties of the T-shaped double quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. The Hamiltonian is solved by means of the slave-boson mean-field theory. We calculate the density of states and the liner conductance in this system with both parallel and antiparallel lead-polarization alignments, and our results show that the transport properties of this system depend on both the tunnelling strength between the two dots and the spin-polarized strength p. This system is a possible candidate for spin valve transistors in the spintronics.
YANG Fu-Bin;WU Shao-Quan;SUN Wei-Li. Spin-Polarized Transport through the T-Shaped Double Quantum Dots with Fano--Kondo Interaction[J]. 中国物理快报, 2007, 24(7): 2056-2059.
YANG Fu-Bin, WU Shao-Quan, SUN Wei-Li. Spin-Polarized Transport through the T-Shaped Double Quantum Dots with Fano--Kondo Interaction. Chin. Phys. Lett., 2007, 24(7): 2056-2059.
[2] Kikoin K and Avishai Y 2001 Phys. Rev. Lett. 86 2090 [3] Takazawa Y, Imai Y and Kawakami N 2002 J. Phys. Soc. Jpn. 71 2234 Tanaka Y and Kawakami N 2005 Phys. Rev. B 72 085304 [4] Apel V M et al 2004 cond-mat/0404691 [5] Cornaglia P S and Grempel D R 2005 Phys. Rev. B 71075305 Ding G H, Kim C K and Nahm K 2005 Phys. Rev. B 71 205313 [6] Ladr\'on de Guevara M L, Claro F and Orellana P A 2003 Phys.Rev. B 67 195335 Dong B and Lei X L 2001 Phys. Rev. B 63 235306 [7] Torio M E, Hallberg K, Ceccatto A H and Proetto C R 2002 Phys.Rev. B 65 085302 Wu S Q and Wang S J 2003 Chin. Phys. Lett. 20 1574 Chen X W, Wu S Q, Wang P and Sun W L 2004 Chin. Phys. Lett. 21 911 [8] Fano U 1961 Phys. Rev. 124 1866 G\'ores J, Goldhaber-Gordon D, Heemeyer S and Kastner M A 2000 Phys. Rev. B 62 2188 [9] Hofstetter W, K\"onig J and Scheller H 2001 Phys. Rev. Lett. 87 156803 Bu\l ka B R, Stefa\'nski P 2001 Phys. Rev. Lett. 86 5128 [10] Chi F and Li S S 2005 Chin. Phys. Lett. 22 2035 Zhou B, Chen X W, Li T, Nie Y M and Wu S Q 2005 Chin. Phys. Lett. 22 2918 Chen X W et al 2006 Chin. Phys. Lett. 23 439 [11] Jauho A P, Wingreen N S and Meir Y 1994 Phys. Rev. B 50 5528 Wang B, Wang J and Guo H 2001 J. Phys. Soc. Jpn. 70 2645 Tanaka Y and Kawakami N 2004 J. Phys. Soc. Jpn. 73 2795 [12] Hewson A C 1993 The Kondo Problem to Heavy Fermions(Cambridge: Cambridge University) Coleman P 1984 Phys. Rev. B 29 3035 [13] Aguado R and Langreth D C 2000 Phys. Rev. Lett. 851946 [14] Meir Y and Wingreen N S 1992 Phys. Rev. Lett. 68 2512 [15] Yuasa S et al 2002 Science 297 234 Xiong Z H, Wu D, Vardeny Z V and Shi J 2004 Nature 427821
2007, Vol. 24 
