Spin-polarized transport in a δ-doped magnetic-barrier nanostructure |
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Authors: | Shuai Li Mao-Wang LuYa-Qing Jiang Sai-Yan Chen |
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Institution: | College of Science, Guilin University of Technology, Guilin 541004, People''s Republic of China |
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Abstract: | We theoretically investigate the electron spin transport properties through a δ-doped magnetic-barrier nanostructure, which can be realized experimentally by depositing two identical ferromagnetic stripes with the opposite in-plane magnetization on the top of a semiconductor heterostructure in parallel configuration and by using atomic layer doping technique. The δ-doping dependent transmission, conductance and spin polarization are calculated exactly by analytically solving Schrödinger equation of the spin electron. It is found that the electronic spin-polarized behavior in this device can be manipulated by changing the weight and/or the position of the δ-doping. Therefore, such a device can be used as a controllable spin filter, which may be helpful for spintronics applications. |
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Keywords: | δ-doped magnetic-barrier nanostructure Spin-polarized transport Spin polarization Spin filter |
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