Spin interactions in a quantum dot containing a magnetic impurity

Details Spin interactions in a quantum dot containing a magnetic impurity Spin interactions in a quantum dot containing a magnetic impurity

2010-07-22

arxiv.org/abs/1007.3965v1

Nanotechnology 21 (2010) 355401

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To be published in Nanotechnology

Scientific paper

10.1088/0957-4484/21/35/355401

The electron and hole states in a CdTe quantum dot containing a single magnetic impurity in an external magnetic field are investigated, using the multiband approximation which includes the heavy hole-light hole coupling effects. The electron-hole spin interactions and s,p-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.

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