Topological insulators made easy

Researchers in New Zealand, Poland, China and the US have succeeded in growing 2D allotropes of both antimony and bismuth on atomically flat bismuth using a simple deposition technique for the first time. These materials are nanoscale van der Waals heterostructures with interesting topological properties that might be exploited in future spin-selective electronics devices……….

http://nanotechweb.org/cws/article/tech/70640