Topology Driven g -Factor Tuning in Type-II Quantum Dots

Abstract

We investigate how the voltage control of the exciton lateral dipole moment induces a transition from singly to doubly connected topology in type-II InAs/GaAsxSb1-x quantum dots. The latter causes visible Aharonov-Bohm oscillations and a change of the exciton g factor, which are modulated by the applied bias. The results are explained in the frame of realistic k→p→ and effective Hamiltonian models and could open a venue for new spin quantum memories beyond the InAs/GaAs realm.