Woo Seok Choi3 articles listing Woo Seok Choi in PNAS, Science Advances, indexed by Paperzzz from Crossref and OSF.Altermagnetic polar metallic phase in ultrathin epitaxially strained RuO 2 films PNASAnisotropic strain relaxation-induced directional ultrafast carrier dynamics in RuO 2 films Science AdvancesMetallicity and anomalous Hall effect in epitaxially strained, atomically thin RuO 2 films PNAS