Topological insulators are strange stuff – the bulk of this material is insulating and cannot carry an electrical current, yet the surfaces of the same material are conducting. This means that charged ...

The rubber around this wire is an insulator. Some materials do not allow electricity to pass through them. These materials are known as electrical insulators. Make a list of all of the objects ...

Topological insulators are materials that are insulating in their interior but can support the flow of electrons on their surface. The underlying cause is time-reversal symmetry: their physics is ...