New material paves the way for more efficient electronics

Image 1: Scanning tunnelling microscopy topography of the honeycomb lattice of germanene Researchers from the University of Twente proved that germanene, a two-dimensional material made of germanium atoms, behaves as a topological insulator. It is the first 2D topological insulator that consists of a single element. It also has the unique ability to switch between 'on' and 'off' states, comparable to transistors. This could lead to more energy-efficient electronics. Topological insulators are materials with the unique property of insulating electricity in their interior while conducting electricity along their edges. The conductive edges allow electrical current to flow without energy loss. "At the moment, electronic devices lose a lot of energy in the form of heat, because defects in the material increase the resistance.