Magnetoexcitons in planar type-II quantum dots in a perpendicular magneticfield - art. no. 155324

We study an exciton in a type-II quantum dot, where the electron is confine d in the dot, but the hole is located in the barrier material. The exciton properties are studied as a function of a perpendicular magnetic field usin g a Hartree-Fock mesh calculation. Our model system consists of a planar qu antum disk. Angular momentum (l) transitions are predicted with increasing magnetic field. We, also study the transition from a type-I to a type-H qua ntum dot which is induced by changing the confinement potential of the hole . For sufficiently large magnetic fields a reentrant behavior is found from l(h) = 0 to l(h) not equal 0 and back to l(h) = 0, which results in a tran sition from type II to type I.