Magnetoexciton in type-II semiconductor nanocone

We study spectral properties of heavy-hole exciton captured by a type-II InP/GaAs nanocone in the effective mass approximation. Assuming that the effective mass of the hole is essentially larger than of the electron, we solve the two-particle Schrödinger equation by using the adiabatic approximation and the Fourier series expansion method. We analyze the alteration of the averaged spatial separation of the electron and the hole, the period of the Aharonov–Bohm oscillations of the energy levels and the magnetic momenta as functions of the external magnetic field, applied along the symmetry axis. Our theoretical analysis reveals a possibility for controlling the electric polarization in type-II semiconductor structure with captured exciton, by means of the applying of an external magnetic field. (paper)