Spin Conductance of Nanowires with Double Coupled Quantum Dots
M. Wołoszyn, B.J. Spisak, P. Wójcik and J. Adamowski
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Kraków, Poland
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Using the computer simulations we have studied the spin conductance of the InAs nanowire with three all-around gates that generate two coupled quantum dots in the nanowire. We have assumed that the same constant voltage is applied to the outermost (left and right) gates and investigated the effect of the varying central-gate voltage (VG) and axially directed magnetic field B on the spin currents. The calculated spin-up and spin-down conductances exhibit pronounced oscillations as functions of VG. In certain intervals of VG, both the spin conductances oscillate in antiphase, which can be applied to the spin-filter operation.

DOI: 10.12693/APhysPolA.129.A-114
PACS numbers: 72.25.Dc, 73.63.Nm