We present results for the phase diagram of the parent compound LaCrAsO under electron doping using the matrix random-phase approximation. At low doping levels, the system stabilizes an antiferromagnetic state in which different Cr sublattices carry opposite spins, consistent with experimental observations. As the doping concentration increases, a stripe-type antiferromagnetic phase becomes favored. At even higher doping, the system repeats the two former magnetic states, but with incommensurate magnetic ordering vectors. The commensurate magnetic phases are associated with more localized electrons in the Cr d3z2−r2 orbital, whereas the incommensurate phases are linked to the dxy orbital, whose stronger overlap favors itinerant-electron magnetism.
@article{arxiv.2601.16908,
title = {Doping-dependent orbital magnetism in Chromium pnictides},
author = {Henri G. Mendonça and George B. Martins and Lauro B. Braz},
journal= {arXiv preprint arXiv:2601.16908},
year = {2026}
}