The δ-Doping-Dependent Spin Polarization in a Both Magnetically and Electrically Confined Semiconductor Heterostructure
In this paper, we theoretically investigate how to control electron-spin polarization by δ-doping in a both magnetically and electrically confined semiconductor heterostructure. It is shown that, due to Zeeman coupling, a considerable spin polarization effect appears in the δ-doped device. It is also shown that both magnitude and sign of spin polarization can be tuned by changing weight or position of the δ-doping. Thus, a δ-doping controllable spin filter can be achieved for spintronics device applications.
KeywordsMagnetically and electrically confined semiconductor heterostructure δ-doping spin polarization effect controllable spin filter
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This work was supported by the Scientific Research Fund of Hunan Provincial Education Department (Grant No. 17C1435).