Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada.
Nanotechnology. 2010 Sep 3;21(35):355401. doi: 10.1088/0957-4484/21/35/355401. Epub 2010 Aug 6.
The electron and hole states in a CdTe quantum dot containing a single magnetic impurity in an external magnetic field are investigated using a multiband approximation which includes the heavy hole-light hole coupling effects. The electron-hole spin interactions and sp-d interactions between the electron, the hole and the magnetic impurity are also included. The exciton energy levels and optical transitions are evaluated using the exact diagonalization scheme. A novel mechanism is proposed here to manipulate impurity spin in the quantum dot which allows us to drive selectively the spin of the magnetic atom into each of its six possible orientations.
在磁场中含有单个磁性杂质的 CdTe 量子点中，利用包括重空穴-轻空穴耦合效应的多能带近似来研究电子和空穴态。还包括电子、空穴和磁性杂质之间的电子-空穴自旋相互作用和 sp-d 相互作用。利用精确对角化方案计算激子能级和光学跃迁。这里提出了一种操纵量子点中杂质自旋的新机制，该机制允许我们有选择地将磁性原子的自旋驱动到其六个可能取向中的每一个。
