Merons and antimerons (IMAGE) University of Liège Caption A twisted bilayer of hexagonal boron-nitride. The moiré polar domains have nontrivial topology, forming a network of polar merons and antimerons. Credit ©Université de Liège Usage Restrictions No commercial use License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.