A fractional corner anomaly reveals higher-order topology

10 Jan 2020 Peterson Christopher W. Li Tianhe Benalcazar Wladimir A. Hughes Taylor L. Bahl Gaurav

Spectral measurements of boundary localized in-gap modes are commonly used to identify topological insulators via the bulk-boundary correspondence. This can be extended to high-order topological insulators for which the most striking feature is in-gap modes at boundaries of higher co-dimension, e.g. the corners of a 2D material... (read more)

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Categories


  • MESOSCALE AND NANOSCALE PHYSICS
  • OPTICS