Spin filtering by a periodic spintronic device

被引:45
作者
Aharony, Amnon [1 ,2 ,5 ]
Entin-Wohlman, Ora [1 ,2 ,5 ]
Tokura, Yasuhiro [3 ]
Katsumoto, Shingo [4 ]
机构
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[2] Ben Gurion Univ Negev, Ilse Katz Ctr Meso & Nanoscale Sci & Technol, IL-84105 Beer Sheva, Israel
[3] NTT Corp, NTT, Basic Res Labs, Atsugi, Kanagawa 2430198, Japan
[4] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[5] Tel Aviv Univ, IL-69978 Tel Aviv, Israel
来源
PHYSICAL REVIEW B | 2008年 / 78卷 / 12期
关键词
D O I
10.1103/PhysRevB.78.125328
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
For a linear chain of diamondlike elements, we show that the Rashba spin-orbit interaction (which can be tuned by a perpendicular gate voltage) and the Aharonov-Bohm flux (due to a perpendicular magnetic field) can combine to select only one propagating ballistic mode, for which the electronic spins are fully polarized along a direction that can be controlled by the electric and magnetic fields and by the electron energy. All the other modes are evanescent. For a wide range of parameters, this chain can serve as a spin filter.
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页数:5
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