Nature CommunicationsRealizing Landau levels with open equifrequency contours around band singularitiesCuicui LuOubo YouYanji ZhengShaojie MaQingdong YangHsun-Chi ChanZhihao WangWenshuo MaYong-Chun LiuShuang Zhang2026-04-04Full textDOI https://doi.org/10.1038/s41467-026-70879-1