期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 21, 期 49, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/49/495304
关键词
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资金
- MOE of China [200221]
- Ministry of Science and Technology of China [2006CB605105, 2006CB921404]
- NSF [PHY-0603759]
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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