Abstract
We have studied magnetoresistance and Hall effect of GaAs/InxGa1−xAs quantum wells with remote Mn impurity. Temperature and magnetic field dependencies of samples resistivity indicate several effects related to the magnetic subsystem. Shubnikov - de Haas oscillations indicate the presence of several types of regions in conduction channel with significantly different hole mobilities. We discussed the impact of magnetic impurities on quantum corrections to conductivity by comparing our results with the data for similar non-magnetic structures. Our results suggest that the presence of Mn atoms leads to the damping of quantum corrections in in the investigated structures.
Highlights
Two-dimensional (2D) semiconductor structures with magnetic impurities are considered to be one of the most promising as a basic system of next-generation spintronics [1]
Due to relatively weak exchange interaction of conducting holes with Mn impurities, samples under study can be considered as a conventional Quantum well (QW) perturbed by magnetic layer
We have studied magnetoresistance and Hall effect of GaAs/InxGa1−xAs QWs with remote Mn impurity
Summary
Two-dimensional (2D) semiconductor structures with magnetic impurities are considered to be one of the most promising as a basic system of next-generation spintronics [1]. Introducing magnetic impurities into semiconductor matrix at concentrations high enough for the related effects (e.g. ferromagnetism) to be observed usually turns systems into strongly disordered media, for which quantum corrections should be significant. Conventional theory predicts that ferromagnetic phase tends to destroy quantum interference correction, while experimental data for such systems can be rather ambiguous [5,6,7]. We have studied magnetotransport properties of GaAs/InxGa1−xAs quantum wells with separated by spacer Mn impurity. Spatial separation of acceptor Mn atoms and conducting holes leads to high mobility values of the latter along with feasibility of magnetic interactions between Mn ions. As far as we know, quantum effects in magnetotransport of systems with spatially separated conducting and magnetic subsystems are poorly studied
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