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Andreev reflection with spin-flip scattering through a T-shaped double quantum dot
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10.1063/1.2724832
/content/aip/journal/jap/101/10/10.1063/1.2724832
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/10/10.1063/1.2724832
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

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.

Image of FIG. 2.
FIG. 2.

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.

Image of FIG. 3.
FIG. 3.

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.

Image of FIG. 4.
FIG. 4.

AR conductance vs spin polarization . , . (a) ; (b) , , respectively. The inset shows the AR vs at .

Image of FIG. 5.
FIG. 5.

AR conductance vs . , , , and . The inset shows the case of single QD.

Image of FIG. 6.
FIG. 6.

AR conductance vs , with . The other parameters are the same as those in Fig. 5.

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/content/aip/journal/jap/101/10/10.1063/1.2724832
2007-05-31
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Andreev reflection with spin-flip scattering through a T-shaped double quantum dot
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/10/10.1063/1.2724832
10.1063/1.2724832
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