Anomalous Edge States and the Bulk-Edge Correspondence for Periodically Driven Two-Dimensional Systems

Jul 23, 2013
Published in:
  • Phys.Rev.X 3 (2013) 3, 031005
  • Published: Jul 23, 2013

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Abstract: (APS)
When a topological insulator is ``driven'' by an applied electromagnetic field, its behavior cannot be predicted based on how it acts when the driving is absent. Theorists show that new conducting edge states can appear and that a new topological invariant, instead of the well-known Chern number, is needed to classify conducting edge states in driven topological insulators.