Abstract:
Many flaws of density functional theory (DFT) can be attributed to the unphysical self-interaction error (SIE). One method to mitigate the SIE is the DFT+U approach. This thesis describes the implementation of this approach in a localized orbital basis set environment with a focus on the advantages and disadvantages of DFT+U. Further, the DFT+U approach is applied to study the stability and mobility of polarons in transition metal oxide systems.