In-plane stray field induced spin-filtering in a two-dimensional electron gas under the modulation of surface ferromagnetic dual-gate

Based upon a hybrid ferromagnet/semiconductor structure consisting of two-dimensional electron gas and a pair of surface ferromagnetic stripes on top, we have theoretically investigated the effect of in-plane stray field omitted frequently in previous studies on the spin-dependent ballistic transport properties in hybrid structure. It is demonstrated here that, in combination with an external-controllable electrostatic modulation, the concerned structure shows a similar function as a lateral spin-polarized resonant tunneling device, where the strong spin-filtering effect occurs and nearly single-mode polarization is anticipated for the proper modulation. More importantly, the spin polarity of transmission electron can be easily transferred from one extreme to the other by switching the magnetization of stripes, showing the promising application as an efficient spin aligner in the developing semiconductor spintronics.

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-11-14T13:59:15Z No. of bitstreams: 1 In-plane stray field induced spin-filtering in a two-dimensional electron gas under the modulation of surface ferromagnetic dual-gate.pdf: 500288 bytes, checksum: 30b311e4b97ccd7be9eeb097bd4bb400 (MD5)

Approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-11-14T14:24:15Z (GMT) No. of bitstreams: 1 In-plane stray field induced spin-filtering in a two-dimensional electron gas under the modulation of surface ferromagnetic dual-gate.pdf: 500288 bytes, checksum: 30b311e4b97ccd7be9eeb097bd4bb400 (MD5)

Made available in DSpace on 2010-11-14T14:24:15Z (GMT). No. of bitstreams: 1 In-plane stray field induced spin-filtering in a two-dimensional electron gas under the modulation of surface ferromagnetic dual-gate.pdf: 500288 bytes, checksum: 30b311e4b97ccd7be9eeb097bd4bb400 (MD5) Previous issue date: 2010

This work was supported in part by the National Basic Research Program of China (Grant No. 2007CB936202).

国内

This work was supported in part by the National Basic Research Program of China (Grant No. 2007CB936202).