Local negative permittivity and topological phase transition in polar skyrmions

Sujit Das, Zijian Hong, Vladimir A. Stoica, Mauro A. P. Gonçalves, Yu‐Tsun Shao, Eric Parsonnet, Eric J. Marksz, Sahar Saremi, Margaret R. McCarter, Armando Reynoso, Christian J. Long, Aaron M. Hagerstrom, D. Meyers, Vishal Ravi, Bhagwati Prasad, Hua Zhou, Zhan Zhang, Haidan Wen, Fernando Gómez‐Ortiz, Pablo García‐Fernández, Jeffrey Bokor, Jorge Íñiguez, J. W. Freeland, Nathan D. Orloff, Javier Junquera, Long‐Qing Chen, Sayeef Salahuddin, David A. Muller, Lane W. Martin, R. Ramesh