Defect-Induced Hedgehog Polarization States in MultiferroicsRemoveLinze Li, Xiaoxing Cheng, Jacob R. Jokisaari, Peng Gao, Jason Britson, Carolina Adamo, Colin Heikes, Darrell G. Schlom, Long-Qing Chen, and Xiaoqing PanPhys. Rev. Lett. 120, 137602 (2018)
