In situ Electric Field Manipulation of Ferroelectric Vortices. (August 2019) - Nelson, Christopher T.; Hong, Zijian; Zhang, Cheng; Yadav, Ajay K.; Das, Sujit; Hsu, Shang-Lin; Chi, Miaofang; Rack, Philip D; Chen, Long-Qing; Martin, Lane W.; Ramesh, Ramamoorthy