Stacking instead of mixing: Improving energy efficiency of topological insulators

The overheating of computer chips is a major obstacle to the development of faster and more efficient computers and mobile phones. One promising remedy for this problem could be a class of materials first discovered just a few years ago: topological insulators, which conduct electricity with less resistance and heat generation than conventional materials. Research on these materials is still in its early stages. A team from Jülich and Aachen has now found a way to control the desired conducting...