Density of states corresponding to charge transfer excitons. The excitons are confined in vertically coupled QDs for two different values of the magnetic field (a, b). The dashed line corresponds to the case without perturbation and the solid line corresponds to the case with corrections given by the perturbation.
Gutiérrez et al. Nanoscale Research Letters 2012 7:585 doi:10.1186/1556-276X-7-585