Dr. Johan Christensen, leader of IMDEA Materials Institute’s Mechanical and Acoustic Metamaterials research group, is among the researchers behind a pioneering study exploring the topological properties of metamaterials. Dr. Johan Christensen, leader of IMDEA Materials Institute’s Mechanical and Acoustic Metamaterials research group, is among the researchers behind a pioneering study exploring the topological properties of metamaterials. General Physics Phys.org – latest science and technology news stories