See, the light comes on. Not so good. And that's because this plastic and rubber band are insulators; they don't allow the electricity to flow easily through them. So, over here I have a metal wire.

Electricity can flow through some materials but not others. If electricity flows through a material, the material is said to “conduct” electricity. In this activity, you can use batteries, an aluminum ...

The thinner the film, the less good it is at conducting electricity. Topological semimetals are different. Analogous to the better-known topological insulators, which conduct electricity along special ...