We report on many-body corrections to one-electron energy spectra of bulk bismuth tellurohalides---materials that exhibit a giant Rashba-type spin splitting of the band-gap edge states. We show that the corrections obtained in the one-shot GW approximation noticeably modify the spin-orbit-induced spin splitting evaluated within density functional theory. We demonstrate that taking into account many-body effects is crucial to interpret the available experimental data.
@article{arxiv.1303.4987,
title = {Many-body effects on the Rashba-type spin splitting in bulk bismuth tellurohalides},
author = {I. P. Rusinov and I. A. Nechaev and S. V. Eremeev and C. Friedrich and S. Blügel and E. V. Chulkov},
journal= {arXiv preprint arXiv:1303.4987},
year = {2015}
}