title: Generation and detection of spin current in the three-terminal quantum dot.
abstract: 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.
authors.affiliation: Department of Physics, Tsinghua University, Beijing, People's Republic of China.
authors.forename: Rong
authors.initials: R
authors.lastname: Lü
authors.forename: Hai-Zhou
authors.initials: HZ
authors.lastname: Lu
authors.forename: Xi
authors.initials: X
authors.lastname: Dai
authors.forename: Jiangping
authors.initials: J
authors.lastname: Hu