We report a theoretical exploration on the control of the Dresselhaus －spin-orbit －coupling (SOC) induced spin polarization via the δ-doping for electrons in the 3-layered semiconductor heterostructure (3-LSH). It is shown that an obvious electron-spin polarization effect still exists when a δ-doping is introduced inside. Moreover, both magnitude and sign of the spin polarization can be controlled by adjusting the weight or position of the δ-doping. Therefore, spin-polarized electrons can be manipulated by the δ-doping technique, and the considered 3-LSH can be used as a structurally-controllable spin filter, which may be helpful for spintronics device applications.

我们报告了对Dresselhaus －自旋轨道－耦合（SOC）通过对3层半导体异质结构（3-LSH）中的电子进行δ掺杂来控制自旋极化的理论探索。结果表明，当内部引入δ掺杂时，仍然存在明显的电子自旋极化效应。此外，可以通过调节δ掺杂的重量或位置来控制自旋极化的幅度和符号。因此，可以通过δ掺杂技术来控制自旋极化电子，并且可以将所考虑的3-LSH用作结构可控的自旋滤波器，这可能对自旋电子器件的应用有所帮助。