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Volumn 84, Issue 11, 2011, Pages

Enhanced photon-assisted spin transport in a quantum dot attached to ferromagnetic leads

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EID: 80053591777     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.84.115322     Document Type: Article
Times cited : (11)

References (56)
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    • In the present work we consider only the P and AP alignments. We expect that for more general noncollinear magnetizations the present currents will vary monotonically from their parallel (φ=0) to their antiparallel (φ=π) values. In the adiabatic-pumping regime it was found (see, for instance, Ref.) a monotonic suppression of the pumped charge as the angle between the magnetizations of the left and right leads is continuously varied from φ=0 to φ=π
    • In the present work we consider only the P and AP alignments. We expect that for more general noncollinear magnetizations the present currents will vary monotonically from their parallel (φ = 0) to their antiparallel (φ = π) values. In the adiabatic-pumping regime it was found (see, for instance, Ref.) a monotonic suppression of the pumped charge as the angle between the magnetizations of the left and right leads is continuously varied from φ = 0 to φ = π.
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    • An alternative but equivalent version of this equation was derived in Ref., where the distinction between this result and the Tien-Gordon formula was discussed.
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    • Two split peaks in a pumping current, one peak for each spin component, were also found by Cota in Ref. for a double dot system in the presence of magnetic field
    • Two split peaks in a pumping current, one peak for each spin component, were also found by Cota in Ref. for a double dot system in the presence of magnetic field.
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    • In the case of majority up population in both leads in the P alignment we have the opposite behavior seen in Fig. , i.e., the maxima become minima and vice versa. So the dark areas in the plot (TP
    • In the case of majority up population in both leads in the P alignment we have the opposite behavior seen in Fig. , i.e., the maxima become minima and vice versa. So the dark areas in the plot (T P < T AP) arise around the spin down branches instead of the spin up ones.


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