Electric field control of magnetization dynamics in ZnMnSe/ZnBeSe diluted-magnetic-semiconductor heterostructures

摘要

We show that the magnetization dynamics in diluted magnetic semiconductorscan be controlled separately from the static magnetization by means of anelectric field. The spin-lattice relaxation (SLR) time of magnetic Mn2+ ionswas tuned by two orders of magnitude by a gate voltage applied to n-typemodulation-doped (Zn,Mn)Se/(Zn,Be)Se quantum wells. The effect is based onproviding an additional channel for SLR by a two-dimensional electron gas(2DEG). The static magnetization responsible for the giant Zeeman spinsplitting of excitons was not influenced by the 2DEG density.