A system of two quantum wells (QW), one made of HgCdTe and the other of HgCdMnTe, subjected to electric and magnetic fields F and B parallel to the growth direction, is proposed and described theoretically. It is shown that in such a system the spin g factor of mobile electrons strongly depends on the sign and magnitude of electric field. Adjusting F at a constant B one can transfer almost all electrons into one or the other QW and polarize their spins along the desired orientation. Changing B at a constant F can produce a similar transfer and polarization effect. Possible applications of the spatial reservoirs filled with spin-polarized electrons are discussed.
@article{arxiv.1206.4457,
title = {Spatial control of electron spins by electric and magnetic fields in double quantum wells},
author = {Pawel Pfeffer and Wlodek Zawadzki},
journal= {arXiv preprint arXiv:1206.4457},
year = {2012}
}