1, Bismuthene film interrupted at a step in the silicon carbide substrate viewed through a scanning tunnelling microscope. The film areas inevitably end at the substrate step and a conducting edge channel (white) occurs.
2. Schematic illustration of the conducting edge channels at the boundaries of the bismuthene film. The edge channels protect the spins against scattering and thereby allow loss-free and efficient spin-based data transmission.
It’s ultra-thin, electrically conducting at the edge due to quantum effects and insulating within – and all that at room temperature: Physicists from the University of Würzburg have developed a promising new material. The material class of topological insulators is presently the focus of international solids research...
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