Using quasiparticle self-consistent GW calculations we examined the electronic structure of LaNiO3 and the LaNiO3/LaAlO3 superlattice. The effects of electron correlation in Ni-d bands were reasonably well described without any {\it ad hoc} parameter and without the ambiguity related to the double-counting and downfolding issues. The effective mass is about 30% enhanced compared to the GGA result. One band feature, which is believed to be essential for the cuprate-like superconductivity, is not realized and the central Fermi surface pocket does not disappear. Our result is consistent with a recent dynamical mean field calculation based on the d--p model and in contrast to the result from a d-band only model.
@article{arxiv.1402.4915,
title = {Quasiparticle self-consistent GW study of LaNiO$_3$ and LaNiO$_3$/LaAlO$_3$ superlattice},
author = {Myung Joon Han and Hiori Kino and Takao Kotani},
journal= {arXiv preprint arXiv:1402.4915},
year = {2014}
}