Schematic plot of the T-shaped DQD system. Only one quantum dot DQ1 is connected with both leads; another quantum dot QD2 is side coupled to QD1. Energy levels of QD1 and QD2 can be adjusted via the gate voltage.
AR conductance as a function of the Fermi energy. We took , the coupling between the DQD with the two leads, to be symmetric, , and the spin polarization . From (a) to (f), the spin-flip scattering is taken as , 0.05, 0.1, 0.15, 0.25, and 0.35.
AR conductance as a function of the Fermi energy. From (a) to (f) , 0.01, 0.05, 0.1, 0.15, and 0.25. The asymmetric coupling of the DQD with the two leads is considered with and , respectively. The other parameters are the same as in Fig. 2.
AR conductance vs spin polarization . , . (a) ; (b) , , respectively. The inset shows the AR vs at .
AR conductance vs . , , , and . The inset shows the case of single QD.
AR conductance vs , with . The other parameters are the same as those in Fig. 5.
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