Bhandary, S., Assmann, E., Aichhorn, M., & Held, K. (2016). Charge self-consistency in density functional theory combined with dynamical mean field theory: k-space reoccupation and orbital order. Physical Review B, 94, Article 155131. https://doi.org/10.1103/physrevb.94.155131
We study the effects of charge self-consistency within the combination of density functional theory (DFT; WIEN2K) with dynamical mean field theory (DMFT; W2DYNAMICS) in a basis of maximally localized Wannier orbitals. Using the example of two cuprates, we demonstrate that even if there is only a single Wannier orbital with fixed filling, a noteworthy charge redistribution can occur. This effect stems from a reoccupation of the Wannier orbital in k-space when going from the single, metallic DFT band to the split, insulating Hubbard bands of DMFT.We analyze another charge self-consistency effect beyond moving charge from one site to another: the correlation-enhanced orbital polarization in a freestanding layer of SrVO3.
