Graphene not quite perfect but stable enough for technological applications

https://www.tuwien.at/en/tu-wien/news/news-articles/news/graphen-perfektion-ist-unnoetig

"destructive interference".

"The fact that the current flow decreases dramatically at very specific energy values for quantum physical reasons is a highly desirable effect technologically," explains Florian Libisch. "This can be used, for example, to process information on a tiny size scale, similar to what electronic components do in computer chips... quantum information technology, quantum sensing"