Physics Colloquium
The topological Anderson insulator
Alexander Altland
Abstract
Insulating materials are b topologicalb if their band structure encapsulates a non trivial topological index While the bulk properties of topological insulators are not remarkable a fact that has prevented their discovery for decades their most striking signature is the presence of conducting surface states b the celebrated bulk boundary correspondence of topological matter How do topological insulators respond to the inevitable presence of static disorder Given that by definition topological structures are protected against b weak