Generation and detection of spin current in the three-terminal quantum dot

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Rong LüJiangping Hu


We propose a novel device composed of a quantum dot tunneling coupled to ferromagnetic, superconducting, and normal-metal leads. This device can generate, manipulate, and detect pure spin current through the interplay between the spin-polarized quantum transport and the Andreev reflection. The spin current in this device is a well-defined conserved current since there is no need for any spin-orbit coupling. The proposed device is realizable using present nanotechnology.


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