Electronic structure and g factors of CdTe quantum ellipsoids

The electronic structure, electron and hole g   factors and optical properties of CdTe quantum ellipsoids are investigated, in the framework of eight-band effective-mass approximation. It is found that the light-hole states come down in comparison with the heavy-hole states when the spheres are elongated, and become the lowest states of valence band. When the aspect ratio of the ellipsoid length to diameter (e)(e) changes from smaller than 1 to larger than 1, the linear polarization factors change from negative to positive. The electron g factors of CdTe spheres decrease with increasing radius, and are nearly 2 when the radius is very small. Actually, as some of the three dimensions increase, the electron g factors decrease. More dimensions increase, the g factors decrease more. The dimensions perpendicular to the direction of the magnetic field affect the g factors more than the other dimension. The light-hole and heavy-hole g   factors of quantum spheres are equal, and change from 0.880.88 to -1.14-1.14 with increasing radius. When e<1(e>1) the light-hole g factor is smaller (larger) than the heavy-hole g factor.