Switching of a spatial spin configuration of excitonsin Zn1-xMnxTe/ZnTe quantum wells

摘要

Switching of a spatial spin configuration of excitons is realizedrnin a Zn1-xMnxTe/ZnTe single quantum well by applying magnetic field.rnThe circularly-polarized photoluminescence (PL) shows that the downrnspin branch of the Zn1-xMnxTe exciton overlaps with both the up and downrnspin branches of the ZnTe exciton at a crossing field (Hc ) of 4 T, due tornthe giant Zeeman shift of the Zn1-xMnxTe. Crossing and anti-crossingrnbehaviors among those branches are observed, which depends on the spinrnstate of each branch. The PL intensities and lifetimes in those layersrnbecome the same around Hc , due to the mixing of wavefunctions of thernexcitons generated in those layers. Avobe Hc , the spatial spin separationrnof the excitons is confirmed from the peak energy, the intensity, and thernpolarization property of the exciton PL.